The main factors,effecting determination of the sampling volumn in the monitoring of air and waste gas samples by the enriching sampling method,are discussed in the paper.

A stomach large volume injection/gas chromatography-mass spectrometry(LVI/GC-MS) coupled with solid phase extraction(SPE) method for the determination of 13 pesticide residues in rice sample was presented in this paper.

Performance for dioxin determination by gas chromatography-mass spectrometry coupled with large volume injection was studied.

A large volume injection-gas chromatography-mass spectrometry(LVI-GC-MS) method for the determination of 205 pesticide residues in spinach,cabbage,apple,rice and bean samples was developed.

On the basic principle of the gas chromatograph,the penetration volume and the safe sampling volume of perfluorodimethylcyclobutane(PDCB) tracer in atmosphere through Carboxen-569 adsorption tube were tested.

the influence of temperature and sampling speed on the penetration volume and the safe sampling volume were investigated.

A novel method was developed for the simultaneous determination of nine haloacetic acids (HAAs) (mono, di, trichloroacetic acids; mono, di, tribromoacetic acids; bromochloroacetic acid, dibromochloroacetic acid, and bromodichloroacetic acid) and six anions (fluoride, chloride, nitrite, nitrate, phosphate and sulfate) in drinking water by ion chromatography with large volume direct injection.