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Journal articles on the topic 'Pre-derivatization'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

SP., Karuppiah, and Anverbasha K. "Derivatization methodology in analytical separation." Journal of Indian Chemical Society Vol. 92, Apr 2015 (2015): 447–50. https://doi.org/10.5281/zenodo.5594449.

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Department of Chemistry, Sathyabama University, Chennai-600 117, India <em>E-mail </em>: Karu70123@rediffmail.com Derivatization is the transformation of one chemical compound into another with similar chemical structure. The chemical compounds specific functional group that involves in the derivatization reaction which transforms a educt to a derivate from boiling point, melting point, solubility, reactivity and chemical composition. This results in new chemical properties is used for separation and quantification. In HPLC there are two kinds of derivatization methods such as pre-column deriv

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2

Soma, Yuki, Yoshihiro Izumi, Takehiko Shimohira, et al. "In-Needle Pre-Column Derivatization for Amino Acid Quantification (iPDAQ) Using HPLC." Metabolites 12, no. 9 (2022): 807. http://dx.doi.org/10.3390/metabo12090807.

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Pre-column fluorescent derivatization has been used for the fast quantification of amino acids using high-performance liquid chromatography (HPLC) systems. However, it generally requires an offline in-vial derivatization process with multiple derivatization reagents. The offline derivatization requires the same number of reaction vials as the number of sample vials for use as a reaction chamber for the derivatization reaction in an autosampler. Therefore, the number of samples analyzed per batch using the pre-column derivatization method is halved. To benefit from the pre-column derivatization

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3

Sanzheev, A. P., A. A. Mikhina, D. A. Sevko, et al. "Existing problems and ways of their solution in the analysis of amino acid composition." Proceedings of the Voronezh State University of Engineering Technologies 80, no. 4 (2019): 185–89. http://dx.doi.org/10.20914/2310-1202-2018-4-185-189.

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For obtain accurate aminoacids analysis results for peptide samples it is need to pay attention for method of analysis and method of sample preparation. Now some samplpreparation methods are known: acid and basic hydrolysis. In this article the comparison of two methods of aminoacids analysis were observed: pre-column or post-column derivatization. Analysis of lysine in lysine sulphate was studied, results were compared with control samples. For pre-column derivatization o-phthalic anhydride was used, and for post-column derivatization ninhydrin reagent was used. In experimental part advantage

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4

Alimzhanova, M., and D. Makhayeva. "Identification of flavonoids in plant samples by gas chromatography-mass spectrometry with pre-derivatization." International Journal of Biology and Chemistry 9, no. 1 (2016): 46–51. http://dx.doi.org/10.26577/2218-7979-2016-9-1-46-51.

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5

Okayama, A., S. Fujii, and R. Miura. "Optimized fluorometric determination of urinary delta-aminolevulinic acid by using pre-column derivatization, and identification of the derivative." Clinical Chemistry 36, no. 8 (1990): 1494–97. http://dx.doi.org/10.1093/clinchem/36.8.1494.

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Abstract We previously reported the usefulness of a fluorometric method to determine urinary delta-aminolevulinic acid (ALA) concentrations by using post-column derivatization to monitor the effect of lead exposure. We have further improved the method by introducing pre-column derivatization by using reaction of ALA with acetylacetone and formaldehyde. Response of the hematopoietic system to lead exposure can now be easily detected at blood lead concentrations as low as 162 micrograms/L. The fluorescent ALA derivative, a new aromatic product, 2-methylideneamino-3,5-diacetyl-4,6-dimethylphenylp

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6

Xiao, Cenjun, Jing Xiao, Yuan Wu, et al. "Determination of Amino Acids of Novel Food in Food by HPLC Coupled with Pre-Column Derivatization." Foods 13, no. 24 (2024): 4012. https://doi.org/10.3390/foods13244012.

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A method for simultaneous determination of Theanine and γ-aminobutyric acid (GABA), as the novel food of amino acids, which was established using pre-column derivatization and high-performance liquid chromatography (HPLC). 4-Dimethylaminoazobe nzene-4′-sulfonyl chloride (DABS-Cl) is employed as the derivatization reagent with chromophore linked to Theanine and GABA, which lacks chromophore for DAD analysis in its pristine structure. After the detection wavelength was confirmed, the chromatographic and derivatization conditions were also optimized, including the chromatographic column, mobile p

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7

Kawasue, Shimba, Kyoko Kuniyoshi, Masashi Uema, and Naomasa Oshiro. "Tetrodotoxin Derivatization with a Newly Designed Boron Reagent Leads to Conventional Reversed-Phase Liquid Chromatography." Toxins 16, no. 6 (2024): 260. http://dx.doi.org/10.3390/toxins16060260.

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Tetrodotoxin (TTX) is a representative natural toxin causing pufferfish food poisoning, which is especially prominent in East and Southeast Asia, including Japan. TTX has been analyzed through post-column derivatization high-performance liquid chromatography (HPLC), ion-pair LC-MS(/MS), and hydrophilic interaction liquid chromatography (HILIC)-MS(/MS) as alternatives to the mouse bioassay method. However, post-column derivatization requires a system for online derivatization reactions, and with the ion-pair LC-MS approach, it is difficult to remove residual ion-pair reagents remaining in the e

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8

Itsusei, Fujita. "Determination of sugars in sports drinks." International Journal of Case Studies 1, no. 3 (2013): 1–6. https://doi.org/10.5281/zenodo.3520399.

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Mono- and disaccharides are routinely quantified with a differential refractometer. However, we developed a simpler analytical method involving pre-derivatization and high- performance liquid chromatography to achieve a high recovery rate.The purpose of our study was to understand the amount of sugar in sports drinks in order to determine marked consumption leads to tooth decay. Therefore, we quantified sugars in sports drinks.

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9

Bardelmeijer, Heleen A., Joop C. M. Waterval, Henk Lingeman, Ron van 't Hof, Auke Bult, and Willy J. M. Underberg. "Pre-, on- and post-column derivatization in capillary electrophoresis." Electrophoresis 18, no. 12-13 (1997): 2214–27. http://dx.doi.org/10.1002/elps.1150181212.

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10

Li, Yi, Jinhui Zhou, Xiaofeng Xue, et al. "Fluorometric determination of proline in honey by high-performance liquid chromatography after pre-column derivatization with 7-fluoro-4-nitrobenzo-2-oxa-1,3-diazole (NBD-F)." Analytical Methods 7, no. 18 (2015): 7625–30. http://dx.doi.org/10.1039/c4ay02886d.

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11

Ai, Yujie, Zhi Yu, Yuqiong Chen, et al. "Rapid Determination of the Monosaccharide Composition and Contents in Tea Polysaccharides from Yingshuang Green Tea by Pre-Column Derivatization HPLC." Journal of Chemistry 2016 (2016): 1–5. http://dx.doi.org/10.1155/2016/6065813.

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A pre-column derivatization high-performance liquid chromatography (HPLC) method was developed and optimized to characterize and quantify the monosaccharides present in tea polysaccharides (TPS) isolated from Yingshuang green tea. TPS sample was hydrolyzed with trifluoroacetic acid, subjected to pre-column derivatization using 1-phenyl-3-methyl-5-pyrazolone (PMP), and separated on an Agilent TC-C18column (4.6 mm × 250 mm, 5 μm) with UV detection at 250 nm. A mixture of ten PMP derivatives of standard monosaccharides (mannose, ribose, rhamnose, glucuronic acid, galacturonic acid, glucose, xylos

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12

Li, Jiaxin, Eyoro Noah Nadine Joelle, Qian Yang, Feng Zheng, Wenyuan Liu, and Jing Liu. "Determination of residual phenylhydrazines in drug substances by high-performance liquid chromatography with pre-column derivatization." Analytical Methods 11, no. 48 (2019): 6146–52. http://dx.doi.org/10.1039/c9ay02231g.

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13

Petha, Narendra H., Rama S. Lokhande, Devender T. Seshadri, Raju M. Patil, Tanaji S. Bhagat, and Jitendra G. Patil. "A simple pre-column derivatization method for the determination of mancozeb technical (fungicide) by reverse phase HPLC-UV." Analytical Methods 9, no. 32 (2017): 4702–8. http://dx.doi.org/10.1039/c7ay00830a.

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14

Mu, Li, Yuhang Liu, Huihong Luo, et al. "Determination of the stability of sodium cyclamate during deep-frying using HPLC." PLOS ONE 19, no. 8 (2024): e0308220. http://dx.doi.org/10.1371/journal.pone.0308220.

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The oil used to fry food is often used multiple times to reduce costs. However, when foods containing sweeteners are processed in this way, the sweeteners may produce substances harmful to the body as a result of repeated frying at high temperatures. This article investigated the stability of sodium cyclamate during deep-frying by HPLC using a pre-column derivatization method. The results showed that cyclohexylamine was a decomposition product of a standard sample of sodium cyclamate when deep-fried at 200°C for 25 min. A pre-column derivatization/HPLC method was established to determine cyclo

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15

Xia, Lian, Chuanxiang Wu, Zhiwei Sun, and Jinmao You. "2-(2-(Pyren-1-yl)-1H-benzo[d]imidazol-1-yl)-ethyl-4-methyl benzenesulfonate (PBITS) and its application for determination of bile acids by HPLC-FLD-MS." Anal. Methods 6, no. 4 (2014): 1135–41. http://dx.doi.org/10.1039/c3ay40684a.

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A method of high performance liquid chromatography-fluorescence detection-mass spectrometry identification coupled with pre-column derivatization to determine bile acids from bio-sample has been developed here.

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16

Alekseeva, K. A., D. I. Pisarev, A. Yu Malyutina, E. T. Zhilyakova, Z. E. Tsvetkova, and Yu A. Polkovnikova. "WORKING OUT QUALITY STANDARDS OF MODEL COMPOSITION SAMPLES OF GRANULATED DOSAGE FORM WITH GLUTATHIONE RESTORED." Pharmacy & Pharmacology 7, no. 1 (2019): 13–19. http://dx.doi.org/10.19163/2307-9266-2019-7-1-13-19.

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Biologically active sulfur-containing compounds (BASC) exhibit pronounced antioxidant properties. Glutathione reduced (GSH) occupies a particular position among these compounds. It represents a key link in the 3 antioxidant systems of the body from the existing four. Based on the foregoing, a GSH-based dosage form with antioxidant properties was proposed. The aim of this study is to work out a model granulated dosage form based on GSH and methods of its analysis by means of pre-column derivatization with ortho-phthalic aldehyde.Materials and methods.GSH and granulated dosage form based on GSH

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17

Li, Yu, Chen Zhang, Chong Meng та Chang Zhi Zhou. "Ultrasound-Assisted Emulsiﬁcation Microextraction-Solvent Floating Solidification-Pre-Column Derivatization for the Determination of Estrogens in Water Samples". Advanced Materials Research 663 (лютий 2013): 899–904. http://dx.doi.org/10.4028/www.scientific.net/amr.663.899.

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The method of ultrasound-assisted surfactant-enhanced emulsiﬁcation microextraction combined with pre-column derivatization (UAE-SEEME-SFO-PD) was developed to simultaneously extract and determine the estrogens such as estriol (E3), bisphenol A (BPA), 17α-Ethynylestradiol (EE2), estradiol (E2) and nonylphenol (NP) in water samples. Central composite design was employed to investigate the effects of the factors, including emulsifier (Tween 20) volume, extractant (dodecanol) volume, ultrasonic power, ultrasonic time, the amount of derivating agent (paranitrobenzoyl chloride), temperature of deri

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18

Ziegler, Frédéric, Jacques Le Boucher, Colette Coudray-Lucas, and Luc Cynober. "Plasma amino-acid determinations by reversed-phase HPLC: Improvement of the orthophthalaldehyde method and comparison with ion exchange chromatography." Journal of Automatic Chemistry 14, no. 4 (1992): 145–49. http://dx.doi.org/10.1155/s1463924692000270.

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RP-HPLC with automated pre-column OPA derivatization is clearly a suitable alternative for assaying physiological AA and may be particularly useful for AA present at low concentrations (free tryptophan, plasma 3-methylhistidine).

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19

KAGEYAMA, Naoko, Mina NAKAMURA, Kazutaka SHIMBO, Toshimi MIZUKOSHI, and Hiroshi MIYANO. "Comprehensive Dipeptide Analysis by Pre-column Derivatization LC/MS/MS." BUNSEKI KAGAKU 69, no. 4.5 (2020): 173–78. http://dx.doi.org/10.2116/bunsekikagaku.69.173.

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20

Korany, M. A. T., R. S. Haggag, M. A. Ragab, and O. A. Elmallah. "Liquid Chromatographic Determination of Amikacin Sulphate after Pre-Column Derivatization." Journal of Chromatographic Science 52, no. 8 (2013): 837–47. http://dx.doi.org/10.1093/chromsci/bmt126.

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21

Morier-teissier, E., K. Drieu, and R. Rips. "Determination of Polyamines by Pre-Column Derivatization and Electrochemical Detection." Journal of Liquid Chromatography 11, no. 8 (1988): 1627–50. http://dx.doi.org/10.1080/01483918808076726.

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22

Barends, D. M., J. S. Blauw, C. W. Mijnsbergen, C. J. L. R. Govers, and A. Hulshoff. "Pre-column derivatization of aminoglycosides with 1-fluoro-2,4-dinitrobenzene." Journal of Chromatography A 322 (January 1985): 321–31. http://dx.doi.org/10.1016/s0021-9673(01)97691-5.

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23

Lunte, Susan M. "Pre- and post-column derivatization reactions for liquid chromatography—electrochemistry." TrAC Trends in Analytical Chemistry 10, no. 3 (1991): 97–102. http://dx.doi.org/10.1016/0165-9936(91)85079-7.

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24

Magdy, Galal, Fathalla Belal, and Heba Elmansi. "Rapid microwave-assisted synthesis of nitrogen-doped carbon quantum dots as fluorescent nanosensors for the spectrofluorimetric determination of palbociclib: application for cellular imaging and selective probing in living cancer cells." RSC Advances 13, no. 7 (2023): 4156–67. http://dx.doi.org/10.1039/d2ra05759j.

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The current study introduces a spectrofluorimetric method for the estimation of palbociclib depending on a novel fluorescent carbon quantum dots-based nanosensor without the need for any pre-derivatization steps for the first time.

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25

Varghese, Beena, Saleh N. Al-Busafi, FakhrEldin O. Suliman, and Salma M. Z. Al-Kindy. "3-Naphthyl-1-phenyl-5-(4-carboxyphenyl)-2-pyrazoline – a pyrazoline based heterocyclic dye as a fluorescent label for biomolecules containing an amino group and its evaluation using HPLC." Analytical Methods 8, no. 13 (2016): 2729–36. http://dx.doi.org/10.1039/c5ay02952j.

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The use of 3-naphthyl-1-phenyl-5-(4-carboxyphenyl)-2-pyrazoline as a pre-column derivatization agent for the HPLC analysis of biomolecules containing an –NH<sub>2</sub> group is proposed in this article.

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26

Luo, Lan, Yan Ren, Jie Liu, and Xiaodong Wen. "Investigation of a rapid and sensitive non-aqueous reaction system for the determination of acrylamide in processed foods by gas chromatography-mass spectrometry." Analytical Methods 8, no. 30 (2016): 5970–77. http://dx.doi.org/10.1039/c6ay00673f.

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Dimethyl sulfoxide (DMSO) was used to extract and pre-concentrate acrylamide (AA) from food samples before derivatization with xanthydrol. Concentrated AA in DMSO reacted with xanthydrol in 1 min at 40 °C under mild conditions before GC-MS determination.

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27

Xie, Juan, Yongxin Li, Jing Zhang, et al. "Simultaneous determination of four aliphatic amines in aquatic products by ultrasound-assisted dispersive liquid–liquid microextraction coupled with high performance capillary electrophoresis." Anal. Methods 6, no. 14 (2014): 5140–46. http://dx.doi.org/10.1039/c4ay00509k.

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A simple, rapid, inexpensive and efficient method based on ultrasound-assisted dispersive liquid–liquid microextraction (UDLLME) after pre-column derivatization coupled with high performance capillary electrophoresis (HPCE) has been developed for determination of methylamine (MA), ethylamine (EA), dimethylamine (DMA) and diethylamine (DEA) in aquatic products.

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28

NOJIRI, Shuko, Mitsuo NAKAZATO, Yoko KASUYA, et al. "Determination of Sucralose in Foods by HPLC Using Pre-column Derivatization." Journal of the Food Hygienic Society of Japan (Shokuhin Eiseigaku Zasshi) 43, no. 5 (2002): 289–94. http://dx.doi.org/10.3358/shokueishi.43.289.

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29

Emara, S., T. Masujima, W. Zarad, M. Kamal, and R. EI-Bagary. "Online Pre-Column Derivatization with Chromatographic Separation to Determine Folic Acid." Journal of Chromatographic Science 51, no. 6 (2012): 544–51. http://dx.doi.org/10.1093/chromsci/bms170.

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30

Amini, M., M. PirAli Hamedani, M. Vosooghi, M. Nabavi, and A. Shafiee. "Pre-column derivatization of rofecoxib for determination in serum by HPLC." Analytical and Bioanalytical Chemistry 382, no. 5 (2005): 1265–68. http://dx.doi.org/10.1007/s00216-005-3249-6.

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31

Sánchez, F. García, A. Navas Díaz, A. García Pareja, and V. Bracho. "Liquid Chromatographic Determination of Asulam and Amitrole with Pre-Column Derivatization." Journal of Liquid Chromatography & Related Technologies 20, no. 4 (1997): 603–15. http://dx.doi.org/10.1080/10826079708010947.

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32

Joyce, M. Gordon, Sergei Radaev, and Peter D. Sun. "A rational approach to heavy-atom derivative screening." Acta Crystallographica Section D Biological Crystallography 66, no. 4 (2010): 358–65. http://dx.doi.org/10.1107/s0907444909053074.

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Despite the development in recent times of a range of techniques for phasing macromolecules, the conventional heavy-atom derivatization method still plays a significant role in protein structure determination. However, this method has become less popular in modern high-throughput oriented crystallography, mostly owing to its trial-and-error nature, which often results in lengthy empirical searches requiring large numbers of well diffracting crystals. In addition, the phasing power of heavy-atom derivatives is often compromised by lack of isomorphism or even loss of diffraction. In order to ove

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33

Farouk, Hanan, Hager Ebrahim, Heba Sonbol, et al. "Sensitivity Enhancement for Separation-Based Analytical Techniques Utilizing Solid-Phase Enrichment Approaches and Analyte Derivatization for Trace Analysis in Various Matrices." Separations 10, no. 6 (2023): 351. http://dx.doi.org/10.3390/separations10060351.

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Despite the fact that strong routine separation methodologies can give reliable specificity and validity at usual working pharmaceutical concentrations, they may fail at very low concentration levels. This poses considerable challenges for researchers investigating product purity and therapeutic drug monitoring. Sensitivity enhancement procedures are thus required to maximize the performance of separation techniques. Solid-phase extraction/solid-phase enrichment (SPE/SPEn) and pre-, post-, and in-column derivatization, as well as the use of sensitive detection devices, are the simplest strateg

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34

Kaushik, Patel. "Analytical method for simultaneous estimation of voglibose and mitiglinide calcium hydrate by validated RP-HPLC method." Journal of medical pharmaceutical and allied sciences 11, no. 4 (2022): 5066–71. http://dx.doi.org/10.55522/jmpas.v11i4.2646.

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A combination of Voglibose and Mitiglinide calcium hydrate is used in Type- 2 diabetes. The method was based on pre-column derivatization of Voglibose with 9-Fluorenylmethyloxycarbonyl chloride due to lack of chromophoric group it cannot directly estimated by UV detector in Reverse Phase High Performance Chromatography (RP-HPLC) method. The chromatographic separation was achieved using phosphate buffer (pH 4.0) and methanol (30:70) as mobile phase. Detection was carried out at 233 nm using UV detector. The retention time of Voglibose and Mitiglinide calcium hydrate were found to be 5.233 min a

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35

Chen, Yukun, Congcong Liu, and Weiyang Liang. "Comparative study on the determination of free formaldehyde residue in vaccines by pre-column derivative liquid chromatography and post-column derivatization liquid chromatography." Advances in Analytic Science 4, no. 2 (2023): 13. http://dx.doi.org/10.54517/aas.v4i2.2009.

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<p class="MsoNormal" style="text-indent: 20.1pt; line-height: 15.0pt; mso-line-height-rule: exactly; layout-grid-mode: char; mso-layout-grid-align: none;"><strong><span lang="EN-US" style="font-size: 10.0pt; mso-bidi-font-size: 11.0pt;">Objective:</span></strong><span lang="EN-US" style="font-size: 10.0pt; mso-bidi-font-size: 11.0pt;"> To develop and compare methods for quantifying residual free formaldehyde in vaccines using pre-column and post-column derivatization liquid chromatography, and to assess the consistency between these methods. <strong>Me

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36

Einarsson, Östen, and Lars Hansén. "A PC-controlled module system for automatic sample preparation and analysis." Journal of Automatic Chemistry 17, no. 1 (1995): 21–24. http://dx.doi.org/10.1155/s1463924695000034.

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A simple automatic analytical system, consisting of separate modules, for liquid chromatography has been constructed. The different parts of the automatic machine are an auto sampler, an auto dispenser, a selector valve with eight channels, a heater/cooler, a mixing chamber and a pressure air driven injector valve. The process was controlled by a PC from an easily changeable run protocol. The system was applied to analysis of primary amines. The analysis was performed as a pre-column derivatization reaction of the amines and separation by isocratic reversed-phase HPLC with fluorescent detectio

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37

Van Dam, J., L. Laruelle, and P. Daenens. "Qualitative and Quantitative Determination of Thermal Degradation Products of Type C Hydraulic Fluids." Journal of Fire Sciences 12, no. 4 (1994): 376–87. http://dx.doi.org/10.1177/073490419401200403.

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A qualitative and quantitative analysis of the thermal decompo sition mixtures of some type C hydraulic fluids has been done. The decomposi tion products were identified by gas chromatography/mass spectrometry. Due to the nature of some decomposition compounds, a specific pre-column derivatization technique in combination with a well-adapted capillary column was necessary.

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38

., Mohsen Amini, Morteza Pirali-Hamed ., Hossein Ali Ebrahimi ., Majid Darabi ., and Abbas Shafiee . "Determination of Rofecoxib in Serum with Pre-column Derivatization and Fluorescence Detection." International Journal of Pharmacology 1, no. 4 (2005): 332–35. http://dx.doi.org/10.3923/ijp.2005.332.335.

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39

Koshide, K., R. Tawa, S. Hirose, and T. Fujimoto. "Liquid-chromatographic determination of sisomicin in plasma, with fluorometric pre-column derivatization." Clinical Chemistry 31, no. 11 (1985): 1921–22. http://dx.doi.org/10.1093/clinchem/31.11.1921.

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40

Verma, Krishna K., and Archana Verma. "Determination of Nitrite by Pre-Column Derivatization and High-Performance Liquid Chromatography." Analytical Letters 25, no. 11 (1992): 2083–93. http://dx.doi.org/10.1080/00032719208020077.

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41

Danielson, N. D., M. A. Targove, and B. E. Miller. "Pre- and Postcolumn Derivatization Chemistry in Conjunction with HPLC for Pharmaceutical Analysis." Journal of Chromatographic Science 26, no. 8 (1988): 362–71. http://dx.doi.org/10.1093/chromsci/26.8.362.

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42

Zhang, Mujun. "Determination of Hydroxylamine Hydrochloride in Relugolix Using Pre-Column Derivatization HPLC Method." American Journal of Biomedical Science & Research 23, no. 2 (2024): 145–51. http://dx.doi.org/10.34297/ajbsr.2024.23.003055.

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43

Lehr, Karl-Heinz, and Petra Damm. "Quantification of ciclopirox by high-performance liquid chromatography after pre-column derivatization." Journal of Chromatography B: Biomedical Sciences and Applications 339 (January 1985): 451–56. http://dx.doi.org/10.1016/s0378-4347(00)84680-0.

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44

Nohta, Hitoshi, Tomoyuki Yukizawa, Yosuke Ohkura, Makoto Yoshimura, Junichi Ishida, and Masatoshi Yamaguchi. "Aromatic glycinonitriles and methylamines as pre-column fluorescence derivatization reagents for catecholamines." Analytica Chimica Acta 344, no. 3 (1997): 233–40. http://dx.doi.org/10.1016/s0003-2670(96)00614-9.

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45

Merali, Salim, and Allen B. Clarkson. "Polyamine analysis using N-hydroxysuccinimidyl-6-aminoquinoyl carbamate for pre-column derivatization." Journal of Chromatography B: Biomedical Sciences and Applications 675, no. 2 (1996): 321–26. http://dx.doi.org/10.1016/0378-4347(95)00363-0.

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46

Lai, Fran, Anton Mayer, and Terry Sheehan. "Chiral separation and detection enhancement of propranolol using automated pre-column derivatization." Journal of Pharmaceutical and Biomedical Analysis 11, no. 2 (1993): 117–20. http://dx.doi.org/10.1016/0731-7085(93)80131-j.

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47

Verma, Krishna K., Sunil K. Sanghi, Archana Jain, and Dayashanker Gupta. "Liquid chromatographic determination of bromide after pre-column derivatization to 4-bromoacetanilide." Journal of Chromatography A 457 (January 1988): 345–53. http://dx.doi.org/10.1016/s0021-9673(01)82082-3.

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48

Willberg-Keyriläinen, Pia, Jarmo Ropponen, Manu Lahtinen, and Jaakko Pere. "Improved reactivity and derivatization of cellulose after pre-hydrolysis with commercial enzymes." BioResources 14, no. 1 (2018): 561–74. http://dx.doi.org/10.15376/biores.14.1.561-574.

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Reactivity is an important parameter when considering the chemical modification or dissolution of cellulose. Different pretreatment methods affect cellulose reactivity by decreasing its degree of polymerization (DP) and crystallinity. In this study, the molar mass of cellulose was decreased via enzymatic pretreatment. Three commercial endoglucanase-rich products were tested. The target was to reduce the viscosity of the pulp to below 200 mL/g and, thus, increase the reactivity of the cellulose. For comparison, cellulose was also pretreated with ozone, and the effects of each pretreatment metho

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Morano, Camillo, Aida Zulueta, Anna Caretti, Gabriella Roda, Rita Paroni, and Michele Dei Cas. "An Update on Sphingolipidomics: Is Something Still Missing? Some Considerations on the Analysis of Complex Sphingolipids and Free-Sphingoid Bases in Plasma and Red Blood Cells." Metabolites 12, no. 5 (2022): 450. http://dx.doi.org/10.3390/metabo12050450.

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The main concerns in targeted “sphingolipidomics” are the extraction and proper handling of biological samples to avoid interferences and achieve a quantitative yield well representing all the sphingolipids in the matrix. Our work aimed to compare different pre-analytical procedures and to evaluate a derivatization step for sphingoid bases quantification, to avoid interferences and improve sensitivity. We tested four protocols for the extraction of sphingolipids from human plasma, at different temperatures and durations, and two derivatization procedures for the conversion of sphingoid bases i

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Tashev, Krste, Violeta Ivanova-Petropulos, and Marina Stefova. "Optimization and validation of a derivatization method for analysis of biogenic amines in wines using RP-HPLC-DAD." Macedonian Journal of Chemistry and Chemical Engineering 35, no. 1 (2016): 19. http://dx.doi.org/10.20450/mjcce.2016.884.

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An analytical method for determination of the biogenic amines: tryptamine, putrescine histamine, phenylethylamine, tyramine, cadaverine, spermidine and spermine in red and white wines using pre-column derivatization with dansyl chloride (DnsCl) and reversed phase-high performance liquid chromatography with diode array detector (RP-HPLC-DAD) was developed and optimized. Concentration of DnsCl, pH, time of reaction and evaporation under nitrogen were tested and optimized. Best recoveries, ranging from 72 to 102 % were obtained for all analyzed amines applying derivatization with 10 mg/mL of DnsC

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