摘要
建立了食用植物油（菜籽油、豆油、花生油）经氢氧化钾—乙醇溶液皂化后，直接注入石墨炉测定微量镉的分析方法。本方法以除隔处理的商品精制油作为基质油，加入镉标准溶液，建立标准曲线进行定量。着重研究了石墨炉程序升温条件。方法的回收率为90％—112％，变异系数5．3％－9．8％。
The paper describes a method for the determination of trace cadmiumin vegetable oils-rapeseed oil, soybean oil and peanut oil. The oil samples were saponified with alcoholic KOH, then directly injected into the graphitefurnace of atomic absorption spectrophotometer. A free-Cd commercial cooking oil obtained by HNO_3 extractions was used as a blank matrix .The quantitative analysis of Cd was carried out by calibration curve prepared by adding standard Cd solutions into the free-Cd matrix. The conditions of increasing the temperature stepwise for graphite furnace were emphatically studied in this paper. The recovery was 90-112%and RSD was 5.3-9.8%.
出处
《农业环境保护》
CSCD
1996年第3期116-118,125,共4页
Agro-Environmental Protection
基金
中国科学院"八五"重点应用研究项目!污染农田农业生态整治与安全高效利用模式研究
