摘要
本文提出了用HPIC-AG4柱和用0.5mmol/L Na_2CO_3为淋洗剂(2.0ml/min),离子色谱法测定土壤中Cr(Ⅵ)。50μl进样体积时的检测限为0.1μg/ml Cr(Ⅵ),同时在0.01mol/L NaOH的介质中,H_2O_2将Cr^(3+)氧化成CrO_4^(2-),然后测定总Cr量,由此计算Cr^(3+)的含量。
A method of determination of Cr(Ⅵ) in soils by ion chromatography was proposed, using HPIC-AG4 with 0.5 mmol/L Na2CO3 as eluant (2.0 ml/min). The detection limit is 0.1 lμg/ml Cr(Ⅵ)(for 50 μl injection volume). Cr(Ⅲ) is oxidized to CrO42- by H2O2 in 0.01 mol/L NaOH and the total amount of chromium is determined. The amount of Cr(Ⅲ) is calculated from the total amount of chromium and the amount of Cr(Ⅵ).
出处
《岩矿测试》
CAS
CSCD
北大核心
1991年第2期97-99,共3页
Rock and Mineral Analysis
基金
国家自然科学基金
浙江省自然科学基金资助课题
