搜索结果: 1-15 共查到“工学 gas chromatography”相关记录19条 . 查询时间(0.364 秒)
Quantitative Analysis of Humectants in Tobacco Products Using Gas Chromatography (GC) with Simultaneous Mass Spectrometry (MSD) and Flame Ionization Detection
tobacco tobacco humectants Simultaneous Mass Spectrometry
2015/1/7
This paper describes the modification of an existing gas chromatographic (GC) method to incorporate simultaneous mass spectrometric (MSD) and flame ionization detection (FID) into the analysis of toba...
Determination of volatiles in beer using solid-phase microextraction in combination with gas chromatography/mass spektrometry
GC headspace technique solid phase microextraction volatile compounds
2014/7/10
Headspace solid phase microextraction and purge and trap analysis were used for the determination of volatiles in beer. These methods were compared with the analysis of unconcentrated gas phase and li...
Preparation of flaxseed for lignan determination by gas chromatography–mass spectrometry method
defatting extraction GC/MS hydrolysis lignans
2014/2/25
Since 1980s, several methods for the determination of lignans in food samples have been developed depending on the types of lignans and foods analysed, but mostly on flaxseed as a reference food. In t...
Hollow-Fiber Microporous Membrane Liquid-Liquid Extraction for Determination of Polybrominated Diphenyl Ethers at Trace Levels in Sewage Sludge with Gas Chromatography-Electron Capture Detection
PBDE Gas Chromatography Sewage Sludge Membrane Extraction LPME
2013/3/12
A two-phase hollow-fiber (HF) liquid-phase microextraction (LPME) method followed by gas chromatography was developed for quantification of 8 major polybrominated diphenyl ethers at trace level in sew...
SF6 新气痕量杂质气相色谱分析新方法与电力行业SF6 新气推荐标准（A New Trace Impurity Gas Chromatography Analysis Method for SF6 New Gasand Recommended Standard of SF6 New Gas for Electric Power Industry）
SF6新气 痕量杂质 色谱方法 标准
2010/8/17
介绍了一种SF6新气痕量杂质气相色谱分析的新方法。与DL/T 920—2005《六氟化硫中空气、四氟化碳的气相色谱分析方法》相比较，新方法可以从SF6新气中检出更多的痕量杂质，甚至多达17种，且方法高度智能化并便于普及。考虑到SF6新气中某些杂质会影响有关电力设备的使用寿命，提出了电力行业SF6新气推荐标准的方案。
Gas Chromatography Data Classification Based on Complex Coefficients of an Autoregressive Model
Gas Chromatography Data Classification Complex Coefficients Autoregressive Model
2009/9/7
This paper introduces autoregressive (AR) modeling as a novel method to classify outputs from gas chromatography (GC). The inverse Fourier transformation was applied to the original sensor data, and t...
Flavor Design of Sesame-flavored Dressing Using Gas Chromatography/Olfactometry and Food Kansei Model
sesame-flavored dressing solid-phase microextraction (SPME) sensory analysis
2009/5/31
Instrumental and sensory analyses were carried out on sesame-flavored dressings to identify the odorants affecting their perceived quality. The sampling of the odor-active compounds was performed by s...
Determination of Amitraz Residue by Headspace Gas Chromatography in Honey and Beeswax Samples from Iran
Amitraz Residue Headspace Gas Chromatography
2016/5/31
In this study, 70 samples of honey and beeswax from different beehives (Eastern and Western Azerbaijan, Ardabil territory, Iran), markets and store shelves of (Tehran, Iran) were collected during 2006...
Determination of Reductones, Furans and Organic Acids in Aqueous Model Matrices Using Solid-Phase Extraction and Gas Chromatography/Mass Spectrometry
reductone furan organic acid
2009/5/31
A method using solid-phase extraction (SPE) and GC-MS was developed for the determination of a series of polar and unstable flavor compounds: reductones, furans and volatile organic acids, in aqueous ...
Determination of Thermodynamic Parameters of Some Fluorochlorohydrocarbons in Acetone by Gas Chromatography at Low Temperature and Pressurization
low temperature pressurization chromatography
2009/4/27
Determination of Thermodynamic Parameters of Some Fluorochlorohydrocarbons in Acetone by Gas Chromatography at Low
Temperature and Pressurization。
Determination of Amitraz Residue by Headspace Gas Chromatography in Honey and Beeswax Samples from Iran
Amitraz Residue Headspace Gas Chromatography Honey Beeswax Iran
2009/1/21
In this study, 70 samples of honey and beeswax from different beehives (Eastern and Western Azerbaijan, Ardabil territory, Iran), markets and store shelves of (Tehran, Iran) were collected during 2006...
Quantitative Analysis of in Traditional Egyptian Foods (Koushary and Foul Medams), Black Tea, Instant Coffee and Bottled Waters by Solid Phase Extraction-Capillary Gas Chromatography-Mass Spectroscopy
Phthalates Plasticizers Egyptian Foods
2016/5/31
In the present study, method of solid-phase extraction followed by capillary gas chromatography coupled to mass spectrometry (SPE-GC-MS) was used for quantitative analysis of trace levels of phthalate...
Rapid Determination of Cholesterol in Milk and Milk Products by Direct Saponification and Capillary Gas Chromatography
cholesterol milk products capillary gas chromatography
2008/3/28
A simple method is described for the determination of cholesterol in milk and milk products. Samples (0.2 g) are saponified in capped tubes with 0.5 M methanolic KOH solution by heating for 15 min at ...
Method for Assaying Volatile Compounds by Headspace Gas Chromatography and Application to Growing Starter Cultures
headspace gas chromatography diacetyl leuconostoc mixed culture
2008/3/22
Automatic headspace gas chromatography was used to assay volatile compounds in fermented milks, including diacetyl, which is of particular interest because of its aromatic properties. -Acetolactic aci...
The Use of Gas Chromatography to Measure Carbon Dioxide Production by Dairy Starter Cultures
carbon dioxide gas chromatography dairy starter cultures
2008/3/18
A gas chromatographic method was developed to quantify CO2 produced by dairy starter cultures. The procedure was used to measure CO2 production by Lactococcus lactis ssp. lactis KB, a lactic dehydroge...