Ion trap gas chromatography-mass spectrometry was used for the analysis ofaldrin. The impact trend of the different parameters were investigated in the determination of aldrin. The result showed that the sensitivity i...Ion trap gas chromatography-mass spectrometry was used for the analysis ofaldrin. The impact trend of the different parameters were investigated in the determination of aldrin. The result showed that the sensitivity increased by decreasing the ionization voltage and excitation voltage. The optimum q value was 0.45.展开更多
An effective method for determination of polychlorinated biphenyls (PCBs) in contaminated soil by means of accelerate solvent extraction (ASE) followed with gas chromatography-mass spectrometry (GC/MS) was studied. Th...An effective method for determination of polychlorinated biphenyls (PCBs) in contaminated soil by means of accelerate solvent extraction (ASE) followed with gas chromatography-mass spectrometry (GC/MS) was studied. The reliability and efficiency of ASE for extracting PCBs from contaminated soil has been investigated by comparing with soxhlet extraction. The influence of extract parameters such as temperature, static cycle were discussed. RSD was 1.8%-9.3% .The detection limits is in the range of 0.33-1.33μg/kg. The result showed the method was rapid, sensitive and economic.展开更多
This paper briefly describes the method and applications of isotope dilution mass spectrometry (IDMS) in international comparisons organized by Consultative Committee for Amount of Substance (CCQM).
The conditions of high resolution mass spectrometry (HRMS) for determination of trace seven kinds of PCBs were investigated. Several HRMS parameters were optimized by determination of noise to signal of these PCBs und...The conditions of high resolution mass spectrometry (HRMS) for determination of trace seven kinds of PCBs were investigated. Several HRMS parameters were optimized by determination of noise to signal of these PCBs under different resolution, emission electron energy and so on. The detection limits ranged from 10-30fg at 10 000 resolution.These PCBs in two sea products were tested at this condition.展开更多
文摘Ion trap gas chromatography-mass spectrometry was used for the analysis ofaldrin. The impact trend of the different parameters were investigated in the determination of aldrin. The result showed that the sensitivity increased by decreasing the ionization voltage and excitation voltage. The optimum q value was 0.45.
文摘An effective method for determination of polychlorinated biphenyls (PCBs) in contaminated soil by means of accelerate solvent extraction (ASE) followed with gas chromatography-mass spectrometry (GC/MS) was studied. The reliability and efficiency of ASE for extracting PCBs from contaminated soil has been investigated by comparing with soxhlet extraction. The influence of extract parameters such as temperature, static cycle were discussed. RSD was 1.8%-9.3% .The detection limits is in the range of 0.33-1.33μg/kg. The result showed the method was rapid, sensitive and economic.
文摘This paper briefly describes the method and applications of isotope dilution mass spectrometry (IDMS) in international comparisons organized by Consultative Committee for Amount of Substance (CCQM).
文摘The conditions of high resolution mass spectrometry (HRMS) for determination of trace seven kinds of PCBs were investigated. Several HRMS parameters were optimized by determination of noise to signal of these PCBs under different resolution, emission electron energy and so on. The detection limits ranged from 10-30fg at 10 000 resolution.These PCBs in two sea products were tested at this condition.
