土壤学报2012，Vol.49Issue(6)：1114-1119,6.
顶空色谱法测定土壤中氰和氰化氢残留量
DETERMINATION OF RESIDUES OF CYANOGEN AND HYDROGEN CYANIDE IN SOIL WITH HEADSPACE GAS CHROMATOGRAPHY
摘要
Abstract
Cyanogen (C2N2) is a new type of fumigant, a potential replacement of methyl bromide. However, there is still no standard method available at home and abroad for detecting C2N2 and its degradation product, HCN (hydrogen cyanide) in soil. A method for the determination of residues of C2N2 fumigant and HCN in soil using head-space capillary gas chromatography (HS-GC) with a nitrogen-phosphorus detector ( NPD) was developed; and headspace parameters for pretreatment of C2N2 and HCN in the soil was optimized in this study; and quality control parameters such as precision of standard, limit of detection and limit of quantification for the method were validated in experiments. Results showed that incubated in solution of 30% phosphoric acid at 50℃ for 1 h, the sample with C2N2 and HCN concentration in the range of 0. 1 ~ 10 mg kg-1 displayed a linear relationship with correlation coefficients >0. 99 between C2N2 and HCN concentration and chromatographic peak area. The use of this method to determine C2N2 and HCN in soil is subject to a RSD of 4. 58% and 6. 32% (n = 5) , respectively. Of the method, the limit of detection ( LOD) and the limit of quantification (LOQ) of C2N2 and HCN was 0. 016 and 0. 028 mg kg-1 ( S/N = 3) , 0.053 and 0. 093 mg kg-1 (S/N = 10) , respectively. This method was also proved to be convenient in operation, high in sensitivity and least in outside interference, and therefore, applicable to determination of C2N2 and HCN residues in soil.关键词
土壤/氰(C2N2)/氰化氢(HCN)/熏蒸剂/顶空气相色谱Key words
Soil/ Cyanogen (C2N2) / Hydrogen cyanide (HCN) / Fumigant/ Headspace gas chromatography分类
轻工纺织引用本文复制引用
李保同,曾鑫年,任永林,Desmarchelier J M..顶空色谱法测定土壤中氰和氰化氢残留量[J].土壤学报,2012,49(6):1114-1119,6.基金项目
国家自然科学基金项目(30960081)、澳大利亚联邦科学与工业组织(CSIRO)项目资助 （30960081）
