Accurate determination of melting Point of industrial grade alkyl ketene dimer wax by a simple and automated headspace gas chromatographic technique

2019 ◽  
Vol 1585 ◽  
pp. 192-195
Author(s):  
Ning Yan ◽  
Xin-Sheng Chai
Keyword(s):  
Melting Point ◽  
Accurate Determination ◽  
Chromatographic Technique ◽  
Alkyl Ketene Dimer ◽  
Industrial Grade ◽  
Headspace Gas

Gas Chromatographic Method for Determination of Dimethylamine, Trimethylamine, and Trimethylamine Oxide in Fish-Meat Frankfurters

1991 ◽  
Vol 74 (2) ◽  
pp. 400-403
Author(s):  
Walter Fiddler ◽  
Robert C Doerr ◽  
Robert A Gates
Keyword(s):  
Atlantic Menhaden ◽  
Chromatographic Technique ◽  
Acid Extraction ◽  
Fish Meat ◽  
Flame Ionization ◽  
Trimethylamine Oxide ◽  
Headspace Gas ◽  
Gas Chromatographic Method ◽  
Gas Tight

Abstract A method Is described for analysis of minced fish-meat and surlmi-meat frankfurters for dimethylamine (DMA), trimethyiamine (TMA), and trimethyiamine oxide (TMAO) using a headspace-gas chromatographic technique. After simple acid extraction and addition of NaOH, the headspace was directly Injected Into a gas chromatograph by a gas-tight syringe. DMA and TMA were separated on a Chromosorb 103 column and detected by a flame Ionization detector. TMAO was measured as TMA after Zn reduction. Repeatability of the method for DMA, TMA, and TMAO was 6.6,1.0, and 18.8 ppm, respectively. The method was applicable to Alaska pollock-meat and Atlantic menhaden-meat frankfurters, unwashed, and washed mince and surlml.

Determination of the softening point of rosin by a simple and automated headspace gas chromatographic technique

2018 ◽  
Vol 41 (17) ◽  
pp. 3411-3414
Author(s):  
Yi Dai ◽  
Zhen-Hua Yu ◽  
Jian-Bo Zhan ◽  
Bao-Shan Yue ◽  
Jiao Xie ◽  
...  
Keyword(s):  
Softening Point ◽  
Chromatographic Technique ◽  
Headspace Gas

Rapid and accurate determination of carboxyl groups in carbon materials by headspace gas chromatography

2020 ◽  
Vol 1621 ◽  
pp. 461062
Author(s):  
Junjun Chen ◽  
Junxian Xie ◽  
Zhili Zhang ◽  
Furong Wang ◽  
Jian Hu ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Carbon Materials ◽  
Accurate Determination ◽  
Carboxyl Groups ◽  
Headspace Gas Chromatography ◽  
Headspace Gas

High-throughput determination of the organic matter content in soil and municipal sludge by headspace gas chromatography

2019 ◽  
Vol 11 (47) ◽  
pp. 5963-5968
Author(s):  
Xiaojie Tu ◽  
Zhanbo Hu ◽  
Ting Zhao ◽  
Xin-Sheng Chai ◽  
Jie Wang ◽  
...  
Keyword(s):  
Organic Matter ◽  
Acidic Medium ◽  
Rapid Determination ◽  
Organic Matter Content ◽  
Matter Content ◽  
Chromatographic Technique ◽  
Headspace Gas Chromatography ◽  
Municipal Sludge ◽  
Headspace Gas

This paper reports on a new headspace gas chromatographic technique for rapid determination of organic matter (OM) in soil and municipal sludge samples, based on a redox reaction, i.e., converting OM into CO2 by dichromate at an acidic medium.

Headspace Gas Chromatographic Estimation of Some Yogurt Volatiles

1991 ◽  
Vol 74 (4) ◽  
pp. 630-634 ◽  
Author(s):  
Franz Ulberth
Keyword(s):  
Accurate Determination ◽  
Standard Addition ◽  
Calibration Method ◽  
Relative Standard ◽  
Headspace Gas ◽  
Standard Calibration ◽  
Gas Chromatographic Method ◽  
Aroma Components ◽  
Ppm Level

Abstract A headspace gas chromatographic method Is described for the determination of acetaldehyde, ethanol, acetone, dlacetyl, and 2-butanone In yogurt. Yogurt (2 g) is equilibrated 1 h in a 10 mL vial at 60 °C, and 0.25 mL headspace gas Is splitinjected. The volatiles are baseline-separated In less than 5 min by using a thick film capillary column coated with SE-54. An external standard calibration method fulfills the requirements for an accurate determination of the yogurt aroma components. The accuracy of this method was checked by the standard addition method. The precision of the method, In terms of the relative standard deviation, depends on the analyte concentration. At the 10 ppm volatile level, RSD Is 2%, and at the 0.1 ppm level, 15%.

Quantification of the amine value in aliphatic amine epoxy hardeners by using a reaction-based headspace gas chromatographic technique

2017 ◽  
Vol 9 (16) ◽  
pp. 2440-2444 ◽  
Author(s):  
Wei-Qi Xie ◽  
Yi-Xian Gong ◽  
Kong-Xian Yu
Keyword(s):  
Aliphatic Amine ◽  
Chromatographic Technique ◽  
Headspace Gas

This work investigates a reaction-based and solvent-assisted HS-GC method for the determination of the amine value in aliphatic amine epoxy hardeners.

Quantitative determination of the oleophobicity of food packaging paper using headspace gas chromatographic technique

2021 ◽  
Vol 34 (5) ◽  
pp. 297-302
Author(s):  
Yi Dai ◽  
Zhen‐Hua Yu ◽  
Hao Wang ◽  
Jian‐Bo Zhan ◽  
Jiao Xie ◽  
...  
Keyword(s):  
Quantitative Determination ◽  
Food Packaging ◽  
Chromatographic Technique ◽  
Headspace Gas ◽  
Packaging Paper
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