Relevant bibliographies by topics / Volhard method

Contents

  1. Journal articles

Academic literature on the topic 'Volhard method'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Volhard method.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Volhard method"

1

Rajkovic, Milos, Ivana Sredovic, and Zorana Miloradovic. "Comparison of different methods for determination of sodium chloride in cheese." Journal of Agricultural Sciences, Belgrade 55, no. 1 (2010): 65–77. http://dx.doi.org/10.2298/jas1001065r.

Full text
Abstract:
The content of NaCl (weight fraction of Cl-ions, in %) was analysed in different cheeses, which were bought in supermarkets, and made by domestic manufacturers. Sodium chloride in cheese samples was analysed after the extraction of chloride by nitric acid solution. Concentration of chloride ions was potentiometricly determined, with the chloride selective electrode and titrimetricly by Volhard method. According to the results in the analysis of the content of NaCl in %, by different methods it was determined that the share of NaCl in % ranged from 0.66 to 4.43% (determined by potentiometric route) that is from 0.97 to 4.72% (determined by titrimetric route by Volhard method). The difference in received results in different methods is less if the share of NaCl, in % is higher than 3%. If the share is less than 3%, the difference in results rapidly increases, and the biggest difference is when the share is less than 1%. This analysis was done according to the results received by Volhard method, which is accepted as a standard method. As Volhard method is in connection with cheese resolving by intense oxidation means, azotic acid and potassium permanganate, obligatory in fume board (hood), it is not a practical method. On the other hand, the potentiometric method with usage of the chloride-selective electrode is very simple and gives reliable and reproductive results. In case of a small content of NaCl, in %, higher precision and accuracy of determination by chloride-selective electrode can be obtained by indirect measurement of chloride-ions (by standard addition method).
APA, Harvard, Vancouver, ISO, and other styles
2

Beljaars, Paul R., and William Horwitz. "Comparison of the Volhard and Potentiometric Methods for the Determination of Chloride in Meat Products: Collaborative Study." Journal of AOAC INTERNATIONAL 68, no. 3 (May 1, 1985): 480–84. http://dx.doi.org/10.1093/jaoac/68.3.480.

Full text
Abstract:
Abstract A collaborative study of the determination of chloride in meat products was conducted by the International Organization for Standardization (ISO) to compare the ISO 1841 method (Volhard titration) with the FAO/WHO Codex Alimentarius Committee method (potentiometric titration). Five canned luncheon meat products containing 0.25-2.0% sodium chloride at 4 different spiking levels were analyzed by 11 laboratories. The data were analyzed by ISO statistics (ISO 5725) and by AOAC statistics (Youden-Steiner), the major differences being in the rejection of outliers and in the statement of precision parameters. Good agreement was found between the mean chloride contents of the products as determined by both methods and with the added amounts, although statistically significantly higher sodium chloride recoveries were obtained with the potentiometric method. The within-laboratory variability (repeatability) is greater for the Volhard method, especially for chloride levels below 1.0%. Therefore it is proposed to set the lowest level of determination for the Volhard method at about 1.0% sodium chloride. The among-laboratories variability (reproducibility) of the potentiometric method was comparable with the results from the collaborative studies for chloride in cheese, giving acceptable values for relative standard deviations of 1.5-3.0% for meat products with 0.3-2.0% added sodium chloride. It is recommended that further work be conducted to reduce or eliminate the systematic error present with the potentiometric method as applied to meat and meat
APA, Harvard, Vancouver, ISO, and other styles
3

Haouet, M. Naceur, M. Serena Altissimi, Marisa Framboas, and Roberta Galarini. "Validation of the Volhard method for chloride determination in food." Accreditation and Quality Assurance 11, no. 1-2 (March 31, 2006): 23–28. http://dx.doi.org/10.1007/s00769-006-0116-x.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Zhang, Wei. "Research on Compressive Properties of Sea Sand Concrete." Advanced Materials Research 881-883 (January 2014): 1221–24. http://dx.doi.org/10.4028/www.scientific.net/amr.881-883.1221.

Full text
Abstract:
The chloride ion concentration of sea sand were measured by Volhard method and identified the method of removal chloride ions in sea sand. By comparison of compression test for sea sand concrete and river sand concrete ,two compressive strength performance is basically the same , Verify the feasibility of the concrete of the treated sea sand for bluiding.
APA, Harvard, Vancouver, ISO, and other styles
5

Wang, Yong Zheng, Lei Jiang, Mao Zhen Yue, and Su Fang Bian. "Study on Detection Methods for Chlorine Precipitation during Biomass and Coal Co-Combustion." Applied Mechanics and Materials 229-231 (November 2012): 1423–26. http://dx.doi.org/10.4028/www.scientific.net/amm.229-231.1423.

Full text
Abstract:
In this paper, three detection methods were analyzed to determine the chlorine precipitation from the flue gas: Silver nitrate volumetric analysis (SNVA), Volhard method (VM) and Mercuric thiocyanate spectrophotometric method (MTSM). Results indicated that SNVA and VM were simple and convenient, but unsuitable for the detection of blend fuel due to the high lower limit. MTSM was suitable for biomass and coal co-combustion for its low lower limit and high sensitivity. In addition, MTSM needed less sample solution, which made it more suitable for multiple measurements to reduce errors, and the maximum proportional error was only 3.5%.
APA, Harvard, Vancouver, ISO, and other styles
6

El Ati, Jalila, Radhouene Doggui, and Myriam El Ati-Hellal. "A Successful Pilot Experiment of Salt Reduction in Tunisian Bread: 35% Gradual Decrease of Salt Content without Detection by Consumers." International Journal of Environmental Research and Public Health 18, no. 4 (February 8, 2021): 1590. http://dx.doi.org/10.3390/ijerph18041590.

Full text
Abstract:
As bread is the most consumed food by the Tunisian population and the major source of salt, a pilot experiment of salt reduction in bread was begun in Bizerte city. Salt analysis in bread collected from Bizerte city was done with the Volhard titration method. A one-way Anova test was carried out to assess salt content changes over time. Application of the salt reduction programme allowed a gradual decrease of salt content in bread by 35% during three years without detection by Tunisian consumers. The salt concentration in bread was then reduced from 1.7 ± 0.2 g/100 g to 1.1 ± 0.1 g/100 g (p < 0.0001). The establishment of an effective salt reduction strategy with lifestyle education is needed to reduce hypertension, which is the primary cause of death in Tunisia.
APA, Harvard, Vancouver, ISO, and other styles
7

Lumbantobing, Ria, Mery Napitupulu, and Minarni R. Jura. "Analysis of Cyanide Acid Content in Cassava (Manihot esculenta) Based on Storage Time." Jurnal Akademika Kimia 8, no. 3 (September 24, 2020): 180–83. http://dx.doi.org/10.22487/j24775185.2019.v8.i3.pp180-183.

Full text
Abstract:
Cassava is a tuber of cassava plants which is a source of carbohydrates that can be consumed as food and as snack foods such as chips. However, cassava and the leaves contain cyanide acid (HCN) which is dangerous for the human when consumed in excess. Cyanide acid reduction can be done by washing as well as immersion because of its volatile nature. The aim of this research is to investigate the difference of cyanide acid (HCN) content on peeled and unpeeled cassava with the variation of storage time 0, 2, 4, 6, and 8 days. A preliminary test was done to know the existence of cyanide acid (HCN) in cassava. Method analysis of cassava was titrated with the NH4CNS solution using the argentometric principle of the Volhard method. The results showed that cyanide acid (HCN) content in peeled cassava was higher than unpeeled cassava which was 3.9, 4.7, 5.2, 5.6, and 6.0% respectively for shelled cassava and 3.9, 4.6, 5.1, 5.5, and 5.9% respectively for unpeeled cassava.
APA, Harvard, Vancouver, ISO, and other styles
8

Bennett, James G., Stephen L. Kessel, and Charles E. Rogers. "Corrosivity Test Methods for Polymeric Materials. Part 3- Modified DIN Test Method." Journal of Fire Sciences 12, no. 2 (March 1994): 155–74. http://dx.doi.org/10.1177/073490419401200203.

Full text
Abstract:
This is the third in a series of papers to investigate corrosivity test methods published by the Polyolefins Fire Performance Council, an operating unit of The Society of the Plastics Industry, Inc. In the first paper, 24 polymeric materials were evaluated for smoke corrosivity following the "Stan dard Test Method for Measuring the Corrosive Effect of Smoke from the Burn ing or Decomposition of Materials and Products" proposed by ASTM E05.21.70 which uses a radiant combustion/exposure apparatus. The second paper dis cussed the evaluation of the same 24 materials using the CNET corrosion test method "Plastics-Smoke Generation-Determination of the Corrosivity of Fire Effluents (Static Method)" under consideration by ISO TC61/SC4/WG2 and IEC TC89/WG3 and compared the CNET combustion results with the ASTM E05.21.70 results. In this paper, the 24 polymeric materials were evaluated us ing a modified "Testing of Cables, Wires and Flexible Cords; Corrosivity of Combustion Gases DIN 57 472 Part 813 Standard" acid gas test method and the results are compared to the previous ASTM E05.21.70 and CNET results. These commercially available polymeric materials cover a broad range of com positions used for wire and cable insulation and jacketing. The samples were decomposed in a modified DIN apparatus under dynamic conditions and the combustion gases were absorbed in a water trap where the pH and the conductivity were measured. The DIN apparatus was modified by the addition of gas dispersion frits for improved absorption of the combustion gases in the aqueous solution. The acid content of the aqueous solutions was determined using a silver nitrate/ammonium thiocyanate Volhard titration. The data demonstrate that the modified DIN test method using these indirect determinations of corrosive potential does differentiate polymeric materials, ranking them in a similar order to the ASTM E05.21.70 test method. Little cor relation with the CNET % Corrosivity Factor "COR" was found. Reasons for these differences are discussed. To complete the review of corrosion test methods, studies are under way to evaluate these same 24 materials with the "Fire Response Standard for Deter mining the Corrosive Effect of Combustion Products Using a Cone Corro simeter" proposed by ASTM D09.21.04.
APA, Harvard, Vancouver, ISO, and other styles
9

Li, Tian, Yuanyuan Zhang, Zhiyong Song, Hongtao Wu, and Shuhao Li. "Preparation and characterization of antibacterial silver loaded montmorillonite under microwave irradiation." Science and Engineering of Composite Materials 20, no. 1 (February 1, 2013): 15–22. http://dx.doi.org/10.1515/secm-2012-0060.

Full text
Abstract:
AbstractSilver loaded montmorillonite (Ag-MMT) was prepared by ion exchange reaction under microwave irradiation. The effects of microwave irradiation time, AgNO3 concentration, and microwave power on the silver content of Ag-MMT were investigated using the Volhard method. The time of ion exchange reaction was found to be greatly shortened under microwave irradiation. The most suitable reaction condition was in 0.2 m AgNO3 under 100% microwave power irradiation for 4 min, and the silver content was determined and was found to be 1.23 wt%. The results of the Fourier transform infrared spectrum (FT-IR) and Ag+ release tests confirmed the successful loading of silver and its good slow-release property. The X-ray diffraction (XRD) patterns and ultraviolet-visible (UV-vis) spectra proved the existence of metallic Ag nanoparticles. The Ag-MMT showing a large inhibition zone, high inhibition ratio, and low minimum inhibitory concentration (MIC) value against Staphylococcus aureus ATCC6535 presented a very good antibacterial property.
APA, Harvard, Vancouver, ISO, and other styles
10

Martosuyono, Pujoyuwono, Asri Pratitis, Alexander Prasetya, and Elisabeth Kartika Prabawati. "DESALINATION OF CHITOOLOGOSACCAHARIDES USING GEL FILTRATION AND ULTRAFILTRATION." Squalen Bulletin of Marine and Fisheries Postharvest and Biotechnology 9, no. 3 (December 3, 2014): 127. http://dx.doi.org/10.15578/squalen.v9i3.110.

Full text
Abstract:
Chitooligosaccharide (COS) , which is a derivative product from chitosan, has recently been used as a functional food because it has antimicrobial, antifungal, and antitumor properties. The salt content in chitooligosaccharide is one of the main problems in application as functional food or pharmaceutical medicine. The aim of this study was to remove salt from COS with two desalting techniques and determine the variation of COSs in the product. The desalting technique used were dialysis with 10kD Molecular Weight Cut Off (MWCO) and gel filtration chromatography HiPrep 26/10 desalting with G-25 Superfine Sephadex as stationary phase in the column. In order to detect the presence of COS, Thin Layer Chromatography (TLC) method was used, followed by Matrix-Assisted Laser Desorption-Ionization Time-of-Flight Mass Spectrometry (MALDI–TOF–MS) to detect low concentration of COS. Qualitative and quantitative analysis of salt presence were identified using silver nitrate and Volhard method respectively. Ash content was measured using gravimetric method. Results showed those dialysis and gel filtration chromatographies were successfully remove the most of the salt from COS with efficiency of desalting up to 100%. However, the best desalting technique was gel filtration chromatography HiPrep 26/10 which has more complete COS with various degrees of polymerization present in the result.
APA, Harvard, Vancouver, ISO, and other styles
More sources
You might also be interested in the extended bibliographies on the topic 'Volhard method' for particular source types:
Journal articles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography