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Journal articles on the topic 'HPLC/ms/ms'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

ITO, Junya, Kiyotaka NAKAGAWA, Shunji KATO, and Teruo MIYAZAWA. "Evaluation of Lipid Peroxidation Process Using MS/MS, HPLC-MS/MS, and Chiral Stationary Phase-HPLC-MS/MS." Oleoscience 16, no. 5 (2016): 233–42. http://dx.doi.org/10.5650/oleoscience.16.233.

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2

Kanaki, Katerina, and Spiros A. Pergantis. "HPLC-ICP-MS and HPLC-ES-MS/MS characterization of synthetic seleno-arsenic compounds." Analytical and Bioanalytical Chemistry 387, no. 8 (2007): 2617–22. http://dx.doi.org/10.1007/s00216-007-1171-9.

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3

Wu, Zhi-Jun, Guo-You Li, Dong-Mei Fang, Hua-Yi Qi, Wei-Jian Ren, and Guo-Lin Zhang. "Analysis of Epipolythiodioxopiperazines in FungusChaetomiumcochliodesUsing HPLC-ESI-MS/MS/MS." Analytical Chemistry 80, no. 1 (2008): 217–26. http://dx.doi.org/10.1021/ac071447u.

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4

Gong, Like, Qingbing Xu, Charles Lee, and Hong Zhang. "Selenium speciation analysis of Misgurnus anguillicaudatus selenoprotein by HPLC–ICP–MS and HPLC–ESI–MS/MS." European Food Research and Technology 235, no. 1 (2012): 169–76. http://dx.doi.org/10.1007/s00217-012-1747-2.

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5

Haijiang, Zhang, Wu Yongjiang, and Cheng Yiyu. "Analysis of ‘SHENMAI’ injection by HPLC/MS/MS." Journal of Pharmaceutical and Biomedical Analysis 31, no. 1 (2003): 175–83. http://dx.doi.org/10.1016/s0731-7085(02)00565-4.

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6

Sur, Robin, and Dieter Zimmer. "HPLC-MS/MS in der Rückstandsanalytik von Pflanzenschutzmitteln." Umweltwissenschaften und Schadstoff-Forschung 18, no. 1 (2006): 21–26. http://dx.doi.org/10.1065/uwsf2005.04.093.

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7

Henneman, Linda, Arno G. van Cruchten, Simone W. Denis, et al. "Detection of nonsterol isoprenoids by HPLC–MS/MS." Analytical Biochemistry 383, no. 1 (2008): 18–24. http://dx.doi.org/10.1016/j.ab.2008.08.023.

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8

Vollmer, Martin, Patric Hörth, Gerard Rozing, et al. "Multi-dimensional HPLC/MS of the nucleolar proteome using HPLC-chip/MS." Journal of Separation Science 29, no. 4 (2006): 499–509. http://dx.doi.org/10.1002/jssc.200500334.

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9

Kovalczuk, T., J. Poustka, and J. Hajšlová. "HPLC-MS/MS method for analysis of isoproturon in difficult matrix: poppy seeds." Czech Journal of Food Sciences 26, No. 2 (2008): 146–52. http://dx.doi.org/10.17221/2469-cjfs.

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While several validated methods have been developed for analysis of phenylurea herbicides in staple food plants, analytical procedures suitable for their quantification in minor crops such as poppy seeds are not available. For the registration of isoproturon use in this crop, the documentation of dynamics of its residues following treatment was requested. To accomplish this task, HPLC-MS/MS method was developed. Extraction of residues was realised by methanol-water mixture, Supelclean LC-18 SPE cartridges were used for purification of crude extracts. For HPLC separation of isoproturon SPE frac

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10

Tranova, Yu, P. Yu Myl’nikov, A. V. Shchul’kin, I. V. Chernykh, S. K. Pravkin, and E. N. Yakusheva. "Method for quantitative quercetin detection using HPLC-MS/MS." NAUKA MOLODYKH (ERUDITIO JUVENIUM) 10, no. 3 (2022): 251–58. http://dx.doi.org/10.23888/hmj2022103251-258.

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INTRODUCTION: Human breast cancer resistance protein (BCRP, ABCG2) is a transport protein of ABC superfamily of transporters that uses ATP energy of for its work. BCRP plays an important role in the pharmacokinetics of drugs, therefore all new drugs are recommended to be tested for belonging to its substrates, inducers and inhibitors. The influence of substances on the activity of this transport protein in vitro is evaluated by a change of transmembrane transfer of its substrates, one of which being quercetin. This, in turn, requires the development and validation of a method for its quantitat

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11

Šibul, Filip, Dejan Orčić, Sanja Berežni, Goran Anačkov, and Neda Mimica-Dukić. "HPLC–MS/MS profiling of wild-growing scentless chamomile." Acta Chromatographica 32, no. 2 (2020): 86–94. http://dx.doi.org/10.1556/1326.2019.00546.

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Scentless chamomile (Tripleurospermum inodorum = M. inodora) is a plant belonging to Anthemideae tribe of Asteraceae family, with phenotype similar to the common chamomile, a plant used in human consumption in the form of herbal tea infusion. In order to be able to understand possible health-promoting properties and adverse effects of the scentless chamomile's consumption, it is of essence to examine its chemical composition. The aim of the study was to perform phenolic profiling using high-performance liquid chromatography–tandem mass spectroscopy (HPLC–MS/MS), in comparison to the common cha

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12

Zou, T., P. He, J. Cao, and Z. Li. "Determination of Paraquat in Vegetables Using HPLC-MS-MS." Journal of Chromatographic Science 53, no. 2 (2014): 204–9. http://dx.doi.org/10.1093/chromsci/bmu041.

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13

Hsieh, Yunsheng. "HPLC-MS/MS in drug metabolism and pharmacokinetic screening." Expert Opinion on Drug Metabolism & Toxicology 4, no. 1 (2007): 93–101. http://dx.doi.org/10.1517/17425255.4.1.93.

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14

Van Hulle, Marijn, Chao Zhang, Xinrong Zhang, and Rita Cornelis. "Arsenic speciation in Chinese seaweeds using HPLC-ICP-MS and HPLC-ES-MS." Analyst 127, no. 5 (2002): 634–40. http://dx.doi.org/10.1039/b110940e.

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15

Manners, Gary D., and Andrew P. Breksa. "Identifying citrus limonoid aglycones by HPLC-EI/MS and HPLC-APCI/MS techniques." Phytochemical Analysis 15, no. 6 (2004): 372–81. http://dx.doi.org/10.1002/pca.790.

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16

Hansen, Helle R., and Spiros A. Pergantis. "Investigating the formation of an Sb(v)–citrate complex by HPLC-ICP-MS and HPLC-ES-MS(/MS)." J. Anal. At. Spectrom. 21, no. 11 (2006): 1240–48. http://dx.doi.org/10.1039/b607621a.

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17

Ravasi, Juliana Mourão, Giuseppina Negri, Antonio Salatino, Maria Luiza Faria Salatino, and Marco Aurelio Sivero Mayworm. "GC-MS and HPLC-ESI-MS-MS Characterization of Sanchezia oblonga (Acanthaceae) Extracts." Journal of Food Research 9, no. 1 (2020): 57. http://dx.doi.org/10.5539/jfr.v9n1p57.

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The genus Sanchezia (Acanthaceae) comprises neotropical herbs and shrubs with showy flowers. Sanchezia oblonga (syn. S. nobilis) is a shrub of the rainforests of central and south America. The ethanolic extracts of leaves and stems from S. oblonga were analyzed by GC-EI-MS and RPHPLC-DAD-ESI-MS/MS. Fatty acids (free and esterified) and phytosterols were detected by the former method. Benzyl alcohol glycosides (21 and 25), sinapic acid glycoside esters (29 and 31), ethyl rosmarinate (24), sinapic acid-O-glucoside (28), dihydrosinapic acid-O-glucoside (26), catechin-O-arabinoside (36), in additi

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18

Hermes, Lena, Janis Römermann, Benedikt Cramer, and Melanie Esselen. "Phase II Metabolism of Asarone Isomers In Vitro and in Humans Using HPLC-MS/MS and HPLC-qToF/MS." Foods 10, no. 9 (2021): 2032. http://dx.doi.org/10.3390/foods10092032.

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(1) Background: Metabolism data of asarone isomers, in particular phase II, in vitro and in humans is limited so far. For the first time, phase II metabolites of asarone isomers were characterized and human kinetic as well as excretion data after oral intake of asarone-containing tea infusion was determined. (2) Methods: A high pressure liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (HPLC-qTOF-MS) approach was used to identify phase II metabolites using liver microsomes of different species and in human urine samples. For quantitation of the respective glucuroni

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19

Korzhenevskii, D. A., V. N. Kuptsov, V. A. Mityanina, A. A. Selishcheva, S. V. Saveliev, and T. Yu Kalashnikova. "Identification of the individual molecular species of ceramides derived from human erythrocytes using HPLC/MS and HPLC/MS/MS." Journal of Analytical Chemistry 66, no. 13 (2011): 1270–75. http://dx.doi.org/10.1134/s1061934811130053.

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20

ZHANG, RenJie, YiFeng CHAI, ZhenYu ZHU, and XiaoHang SHEN. "Determination of trazodone in human plasma by HPLC-MS/MS method." Pharmaceutical Care and Research 15, no. 6 (2015): 439–42. http://dx.doi.org/10.5428/pcar20150613.

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21

Pellati, Federica, Giulia Orlandini, Diego Pinetti, and Stefania Benvenuti. "HPLC-DAD and HPLC-ESI-MS/MS methods for metabolite profiling of propolis extracts." Journal of Pharmaceutical and Biomedical Analysis 55, no. 5 (2011): 934–48. http://dx.doi.org/10.1016/j.jpba.2011.03.024.

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22

Li, Hong-Xia, Ming-Yu Ding, Kun Lv, and Jian-Yuan Yu. "DETERMINATION OF THE ACTIVE INGREDIENTS IN CHUANXIONG BY HPLC, HPLC-MS, AND EI-MS." Journal of Liquid Chromatography & Related Technologies 24, no. 13 (2001): 2017–31. http://dx.doi.org/10.1081/jlc-100104443.

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23

Wang, Bo, Jianyu Liu, Xia Zhao, et al. "Determination of Eight Coccidiostats in Eggs by Liquid–Liquid Extraction–Solid-Phase Extraction and Liquid Chromatography–Tandem Mass Spectrometry." Molecules 25, no. 4 (2020): 987. http://dx.doi.org/10.3390/molecules25040987.

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A method for the simultaneous determination of robenidine, halofuginone, lasalocid, monensin, nigericin, salinomycin, narasin, and maduramicin residues in eggs by liquid chromatography–tandem mass spectrometry (LC–MS/MS) was developed. The sample preparation method used a combination of liquid–liquid extraction (LLE) and solid-phase extraction (SPE) technology to extract and purify these target compounds from eggs. The target compounds were separated by gradient elution using high-performance liquid chromatography (HPLC) and ultra-performance liquid chromatography (UPLC). Tandem mass spectrome

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24

Meikle, A. Wayne, James Findling, Mark M. Kushnir, Alan L. Rockwood, Gordon J. Nelson, and Alan H. Terry. "Pseudo-Cushing Syndrome Caused by Fenofibrate Interference with Urinary Cortisol Assayed by High-Performance Liquid Chromatography." Journal of Clinical Endocrinology & Metabolism 88, no. 8 (2003): 3521–24. http://dx.doi.org/10.1210/jc.2003-030234.

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Urinary free cortisol (UFC) excretion over 24 h reflects the production rate of cortisol and is used commonly in the diagnosis of Cushing syndrome. We report on two patients evaluated for Cushing syndrome who had elevated UFC when analyzed by HPLC but normal values for the analysis performed by RIA and HPLC-mass spectrometry/mass spectrometry (HPLC-MS/MS). Other laboratory testing was inconsistent with the diagnosis of Cushing syndrome and raised doubts about the diagnosis. We identified a probable cause of analytical interference as coming from fenofibrate (Tricor), medication taken by the pa

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25

CHURCHWELL, M., N. TWADDLE, L. MEEKER, and D. DOERGE. "Improving LC–MS sensitivity through increases in chromatographic performance: Comparisons of UPLC–ES/MS/MS to HPLC–ES/MS/MS." Journal of Chromatography B 825, no. 2 (2005): 134–43. http://dx.doi.org/10.1016/j.jchromb.2005.05.037.

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26

Sawaya, Alexandra, Ilka Abreu, Nathalia Andreazza, Marcos Eberlin, and Paulo Mazzafera. "HPLC-ESI-MS/MS of Imidazole Alkaloids in Pilocarpus microphyllus." Molecules 13, no. 7 (2008): 1518–29. http://dx.doi.org/10.3390/molecules13071518.

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27

Amr, Ayed S., Mousa N. Ahmad, Jalal A. Zahra, and Mai A. Abdullah. "HPLC/MS-MS Identification of Oak Quercus aegilops Root Tannins." Journal of Chemistry 2021 (March 2, 2021): 1–10. http://dx.doi.org/10.1155/2021/8882050.

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Tannins are natural polyphenolic compounds widely distributed in the plant kingdom in the leaves, bark, fruits, and other parts. They have various biological functions in humans and animals and are used mainly in the pharmaceutical and cosmetic industries. The aim of this work was to isolate, extract, purify, and identify the tannins from the root bark of a common oak tree (Quercus aegilops L.) in Jordan and around the Mediterranean. The results showed that at least one form of ellagitannin (ellagic acid ester), quercitrin, afzelechin, valoneic acid, trigalloyl glucose, and catechin was identi

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28

Mei, Hongcheng, Yangke Quan, Wenhao Wang, et al. "Determination of Diphenylamine in Gunshot Residue by HPLC-MS/MS." Journal of Forensic Science and Medicine 2, no. 1 (2016): 18. http://dx.doi.org/10.4103/2349-5014.162808.

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29

Isenberg, Samantha L., Melissa D. Carter, Brian S. Crow, et al. "Quantification of Hydrazine in Human Urine by HPLC–MS-MS." Journal of Analytical Toxicology 40, no. 4 (2016): 248–54. http://dx.doi.org/10.1093/jat/bkw015.

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30

Arias, A., J. García-Villoria, A. Rojo, N. Buján, P. Briones, and A. Ribes. "Analysis of coenzyme Q10 in lymphocytes by HPLC–MS/MS." Journal of Chromatography B 908 (November 2012): 23–26. http://dx.doi.org/10.1016/j.jchromb.2012.09.027.

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31

Burhenne, J., M. Ludwig, and M. Spiteller. "Polar photodegradation products of quinolones determined by HPLC/MS/MS." Chemosphere 38, no. 6 (1999): 1279–86. http://dx.doi.org/10.1016/s0045-6535(98)00525-6.

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32

Taylor, Paul J., Scott R. Brown, Don P. Cooper, Stephen V. Lynch, and Peter I. Pillans. "A High-throughput Hplc-ms/ms Method For Tacrolimus Measurement." Therapeutic Drug Monitoring 27, no. 2 (2005): 256. http://dx.doi.org/10.1097/00007691-200504000-00191.

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33

Pataridis, Statis, Adam Eckhardt, Katerina Mikulíková, Pavla Sedláková, and Ivan Mikšík. "Identification of collagen types in tissues using HPLC-MS/MS." Journal of Separation Science 31, no. 20 (2008): 3483–88. http://dx.doi.org/10.1002/jssc.200800351.

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34

Noh, Keumhan, Jong Hee Park, Minkyu Kim, et al. "Determination of daumone in mouse plasma by HPLC/MS-MS." Biomedical Chromatography 26, no. 2 (2011): 152–55. http://dx.doi.org/10.1002/bmc.1649.

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35

Miljković, Vojkan. "„Sambucus nigra“ and „Sambucus racemosa“ fruit: a schematic review on chemical characterization." Chemia Naissensis 2, no. 2 (2019): 1–29. http://dx.doi.org/10.46793/chemn2.2.001m.

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Elderberry is a plant which parts are used for healing purposes. It is rich in polyphenolic compounds (anthocyanins, flavonols, phenolic acids, proanthocyanidins). Black elderberry is the most characterized of all elderberry types. In this paper, the emphasis is on published results about the fruit of black elderberry (Sambucus nigra) and red elderberry (Sambucus racemosa), as well as different cultivars within these species. The first step in chemical analysis of a plant material is the extraction. It is important to choose the appropriate extraction technique and solvent(s) for the extractio

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36

Oh, Y. S., J. H. Lee, S. H. Yoon, et al. "Characterization and Quantification of Anthocyanins in Grape Juices Obtained from the Grapes Cultivated in Korea by HPLC/DAD, HPLC/MS, and HPLC/MS/MS." Journal of Food Science 73, no. 5 (2008): C378—C389. http://dx.doi.org/10.1111/j.1750-3841.2008.00756.x.

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37

Komarov, T. N., P. A. Karpova, O. A. Archakova, et al. "Determination of Favipiravir in Human Blood Plasma by HPLC-MS/MS." Drug development & registration 12, no. 3 (2023): 229–39. http://dx.doi.org/10.33380/2305-2066-2023-12-3-229-239.

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Introduction. Favipiravir is one of the most well-known broad-spectrum drugs against many RNA viruses, including the severe acute respiratory syndrome virus 2 [severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)]. Due to its structure, favipiravir is embedded in the RNA of the virus and blocks its further replication in the cell of the human body. Favipiravir is also included in the list of vital and essential medicines, which confirms the importance for Russian healthcare of this drug in the fight against common RNA viruses. We have already published bioanalytical methods for determi

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38

Ortega, Nàdia, Maria-Paz Romero, Alba Macià, et al. "Comparative study of UPLC–MS/MS and HPLC–MS/MS to determine procyanidins and alkaloids in cocoa samples." Journal of Food Composition and Analysis 23, no. 3 (2010): 298–305. http://dx.doi.org/10.1016/j.jfca.2009.10.005.

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39

Zhao, Xia, Bo Wang, Kaizhou Xie, et al. "Development and comparison of HPLC-MS/MS and UPLC-MS/MS methods for determining eight coccidiostats in beef." Journal of Chromatography B 1087-1088 (June 2018): 98–107. http://dx.doi.org/10.1016/j.jchromb.2018.04.044.

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40

Chen, Kun-Ming, Ana Calcagnotto, Junjia Zhu, Yuan-Wan Sun, Karam El-Bayoumy, and John P. Richie Jr. "Comparison of an HPLC-MS/MS Method with Multiple Commercial ELISA Kits on the Determination of Levels of 8-oxo-7,8-Dihydro-2'-Deoxyguanosine in Human Urine." Journal of New Developments in Chemistry 2, no. 2 (2018): 1–13. http://dx.doi.org/10.14302/issn.2377-2549.jndc-18-2430.

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Introduction: Analysis of 8-oxodG is usually conducted by either chromatography-based methods or by immunochemical methods commonly used based upon their low cost and high-throughput. However, concern regarding the accuracy of ELISA methods has complicated their use. We directly compare the levels of urinary 8-oxodG obtained by HPLC-MS/MS with three commercially available ELISA kits in this report. Methods: In the current study, a total of 9 human urine samples were analyzed by LC-MS/MS and three commonly used commercial available ELISA kits. Results: We found that urinary 8-oxodG levels analy

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41

Zhang, Yan, Cuiling Cao, Zhiwei Yang, et al. "Simultaneous determination of 20 phenolic compounds in propolis by HPLC-UV and HPLC-MS/MS." Journal of Food Composition and Analysis 115 (January 2023): 104877. http://dx.doi.org/10.1016/j.jfca.2022.104877.

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42

Gao, Jin, Ming Zhao, Xiaoying Fu, et al. "Identification of Related Substances in Citicoline Sodium Injection by HPLC-DAD and HPLC-MS/MS." Asian Journal of Chemistry 25, no. 14 (2013): 7697–704. http://dx.doi.org/10.14233/ajchem.2013.14572.

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43

Kirby, Jason, William Maher, Michael Ellwood, and Frank Krikowa. "Arsenic Species Determination in Biological Tissues by HPLC - ICP - MS and HPLC - HG - ICP - MS." Australian Journal of Chemistry 57, no. 10 (2004): 957. http://dx.doi.org/10.1071/ch04094.

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The use of high-pressure liquid chromatography coupled directly or by a hydride generation system to an inductively coupled plasma mass spectrometer for the unambiguous measurement of 13 arsenic species in marine biological extracts is described. The use of two chromatography systems; a Supelcosil LC-SCX cation-exchange column eluted with a 20 mM pyridine mobile phase adjusted to pH 2.2 and 2.6 with formic acid, with a flow rate of 1.5 mL min−1 at 40°C, and a Hamilton PRP-X100 anion-exchange column eluted with 20 mM NH4H2PO4 buffer at pH 5.6, with a flow rate of 1.5 mL min−1 at 40°C, was requi

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44

Hsieh, Yu-Jhe, and Shiuh-Jen Jiang. "Application of HPLC-ICP-MS and HPLC-ESI-MS Procedures for Arsenic Speciation in Seaweeds." Journal of Agricultural and Food Chemistry 60, no. 9 (2012): 2083–89. http://dx.doi.org/10.1021/jf204595d.

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45

Westley, Ian S., Raymond G. Morris, Paul J. Taylor, Paul Salm, and Maree J. James. "CEDIA?? Sirolimus Assay Compared With HPLC-MS/MS and HPLC-UV in Transplant Recipient Specimens." Therapeutic Drug Monitoring 27, no. 3 (2005): 309–14. http://dx.doi.org/10.1097/01.ftd.0000164394.47520.12.

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46

Korecka, Magdalena, Dejan Nikolic, Richard B. van Breemen, and Leslie M. Shaw. "The Apparent Inhibition of Inosine Monophosphate Dehydrogenase by Mycophenolic Acid Glucuronide Is Attributable to the Presence of Trace Quantities of Mycophenolic Acid." Clinical Chemistry 45, no. 7 (1999): 1047–50. http://dx.doi.org/10.1093/clinchem/45.7.1047.

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Abstract Background: Mycophenolic acid glucuronide, the primary metabolite of the immunosuppressive agent mycophenolic acid, affords weak inhibition of proliferating and resting lymphocytes and recombinant human inosine monophosphate dehydrogenase in comparison to the active drug. We evaluated the hypothesis that mycophenolic acid is a trace contaminant of the glucuronide metabolite preparation and that this accounts for the observed effects of mycophenolic acid glucuronide on human inosine monophosphate dehydrogenase catalytic activity both in lymphocytes and the pure enzyme. Methods: We used

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47

Park, Mi-Sun, Byung-Joo Kim, and Seung-Woon Myung. "The analysis of pharmaceuticals in drinking water by HPLC/ESI-MS/MS." Analytical Science and Technology 23, no. 5 (2010): 457–64. http://dx.doi.org/10.5806/ast.2010.23.5.457.

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48

Bhusarapu, Satya Prasad, and Jaya Kumari Sekharan. "Estimation of Eravacycline Dihydrochloride in Biological Matrices by LC-MS/MS." Pharmaceutical Methods 10, no. 2 (2019): 6. https://doi.org/10.5281/zenodo.14586110.

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Objective: The validated protein precipitation method was applied for estimation of Eravacycline dihydrochloride in human plasma with Rolitetracycline hydrochloride as an internal standard (ISTD) by using HPLC-ESI-MS/ MS. Methods: The chromatographic separation was achieved with 20mM Ammonium acetate (pH-3.0):Methanol:Acetontrile (20:20:60,%v/v) using the TELOS LU C18 (2) 5µm, 100 x 4.6 mm. The total analysis time was 3 min and flow rate was set to 0.5 mL/min. Results: The mass transitions of Eravacycline dihydrochloride and Rolitetracycline hydrochloride obtained were m/z 632.5®84.3

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49

Ogrodowczyk, Magdalena, Katarzyna Dettlaff, Piotr Kachlicki, and Barbara Marciniec. "Identification of Radiodegradation Products of Acebutolol and Alprenolol by HPLC/MS/MS." Journal of AOAC INTERNATIONAL 98, no. 1 (2015): 46–50. http://dx.doi.org/10.5740/jaoacint.14-096.

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Abstract Two therapeutically active compounds from the group of β-blockers, acebutolol (AC) and alprenolol (AL), in solid form were subjected to ionizing radiation emitted by a beam of high energy electrons from an accelerator with a standard sterilization dose of 25 kGy and in higher doses of 50–400 kGy. The effects of irradiation were detected by chromatographic methods (TLC, HPLC) and a hyphenated method (HPLC/MS/MS). No significant changes in the physicochemical properties of both compounds studied irradiated with 25 kGy were noted, but upon irradiation with the highest dose (400 kGy) the

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50

Pang, Guo-Fang, Chun-Lin Fan, Feng Zhang, et al. "High-Throughput GC/MS and HPLC/MS/MS Techniques for the Multiclass, Multiresidue Determination of 653 Pesticides and Chemical Pollutants in Tea." Journal of AOAC INTERNATIONAL 94, no. 4 (2011): 1253–96. http://dx.doi.org/10.1093/jaoac/94.4.1253.

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Abstract An effcient and sensitive method has been established for simultaneous determination of 653 pesticides in teas by GC/MS and HPLC/MS/MS. The method involved extraction with acetonitrile followed by cleanup using Cleanert-TPT SPE and subsequent identifcation and quantitation of 490 pesticides by GC/MS and 448 pesticides by HPLC/MS/MS. The LODs for pesticides determined by GC/MS were between 1.0 and 500 µg/kg, and those determined by HPLC/MS/MS were between 0.03 and 4820 µg/kg. At the low fortifcation levels of 0.01–100 µg/kg, the average recoveries of 94% of the pesticides determined by

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