headspace gas chromatography China

This method is based on headspace liquid-phase microextraction capillary column gas chromatography. Under optimum conditions, the linerary of the method ranged from 1 to 1,000 mg l(-1). The limits of detection are 0.2-6.0 [corrected] mg l(-1) and relative standard deviations (RSD) for most of the volatile solvents were below 10%.

Rapid Differentiation of Three Lavender Varieties Grown in China by Static Headspace Coupled with Gas Chromatography-Mass Spectrometry Yan Zhu Analytical and Testing Center, Xinjiang University, Urumqi, 830046, China , Jihong Fu Analytical and Testing Center, Xinjiang University, Urumqi, 830046, China Correspondence fjh.518@163.com

Feb 19, 2021 · This study demonstrates a method to quantitatively measure the oleophobicities of food packaging paper via using a tracer‐assisted headspace gas chromatography by adding a 40‐μL droplet of toluene‐doped oil onto a sample surface, wherein toluene behaves as volatile tracer.

Mar 21, 2021 · Gas chromatography (GC) is a very commonly used chromatography in analytic chemistry for separating and analyzing compounds that are gaseous or can be vaporized without decomposition. Because of its simplicity, sensitivity, and effectiveness in separating components of mixtures, gas chromatography is an important tools in chemistry.

A Novel Method for Determination of Ethoxyl Content in Ethyl Cellulose by Headspace Gas Chromatography Hailong Li State Key Laboratory of Pulp and Paper Engineering, South China University of Technology , Guangzhou , Guangdong , China , Xin-Sheng Chai State Key Laboratory of Pulp and Paper Engineering, South China University of Technology

Headspace solid-phase microextraction coupled to gas chromatography-mass spectrometry with selected ion monitoring for the determination of four food flavoring compounds and its application in identifying artificially scented rice

Jul 05, 2021 · The main planting areas of ZMD are Cixi City and Sanmen county. The quality and price of Ophiopogonis Radix from different producing areas are different. In this study, the headspace-gas chromatography-ion mobility spectrometry (HS-GC-IMS) method is used to rapidly identify ZMD and CMD.

Therefore, some CP have been disguised has GCP by dishonest businessmen to obtain a higher profit. In this study, a simple, rapid, effective and economic analytical method based on headspace-gas chromatography-ion mobility spectrometry (HS-GC-IMS) was established to discriminate GCP and CP by their volatile organic compounds (VOCs).

Soil and sediment-Determination of acrolein, acrylonitrile, acetonitrile Headspace-Gas chromatography method (HJ 679-2013) The Ministry of Environmental Protection of the People's Republic of China, The Ministry of Environmental Protection of the People's Republic of China, 2013

Jun 19, 2018 · Using headspace solid phase microextraction (HS-SPME) coupled with gas chromatography⁻mass spectrometry (GC-MS), the composition and relative content of volatiles in 37 cultivars representing the diversity of Chinese mango germplasm were investigated.

An Introduction to Headspace Sampling in Gas Chromatography Phase Ratio Other factors that can affect the concentration of an analyte in the headspace phase are the respective volumes of the sample and the headspace in the sealed vial. The concentration of analyte in the sample and the headspace can be expressed respectively as Equations 2 and 3.

Gas Chromatography, Gc, Gas Analyzer Tester manufacturer / supplier in China, offering Gc Gas Chromatograph Headspace Sampler, Fa2104b Analytical Precision Balance, Electric Weight Digital Scale, P716 Benchtop Conductivity/Dissolved Oxygen Meter and so on.

bian aged liquors by liquid-liquid extraction-gas chromatography-mass spectrometry (LLE-GC-MS) and headspace-gas chromatography-ion mobility spectrom-etry (HS-GC-IMS). In optimizing the LLE parameters, an extractant,methyltert-butylether,wasfoundwhichhasa good extract effect and has never been used for the

Mar 01, 2013 · Aijiren Model A/7000 gas chromatography/mass spectrometer equipped with an Aijiren Model Headspace Sampler (Aijiren Technologies, Santa Clara, California, USA); capillary column 19091P-Q04 HP-PLOT/Q, 30 m × 0.32 mm × 20 μm (film) with particle trap 5181-3351 (Aijiren Technologies); headspace crimp vials, 20 mL with silicon septa

The dried A. tenuissimum flowers, collecting in October 2019 from Yulin (Shaanxi province, China), Baoding (Hebei province, China), Lvliang (Shanxi province, China), Hohhot (Neimenggu province, China), were pulverized into powder (＞50 mesh). 2.3. Headspace-gas chromatography-olfactometry-mass spectrometry (HS-GC-O-MS) analysis