摘要
本文研究了一种用颗粒树脂从水中分离Cr(Ⅵ),用石墨炉原子吸收(GFAAS)法进行水中铬形态分析的方法。在加热搅拌条件下,用717阴离子交换树脂颗粒从水中定量分离Cr(Ⅵ),Cr(Ⅲ)不滞留在树脂上。树脂颗粒直接进入石墨管中进行原子吸收测定。对水中共存的阴、阳离子的干扰和消除方法进行了探讨,水中总Cr用石墨炉原子吸收法直接测定。本方法操作简单、取样量少、灵敏度高,能有效地进行水中铬的形态分析。Cr(Ⅵ)和总Cr的检出限分别为0.01μg/L和0.2μg/L,精密度分别为3.77％和2.64％。对于饮用水和河水,C(Ⅵ)和总Cr的回收率为91.0～108％。将本方法应用于天然水分析,研究了珠江某河段Cr(Ⅵ)和总Cr的分布。
Cr(Ⅵ) is quantitatively ads rbcd onto several 717 anion exchange beads from samplesolution. Beads are injected into graphite furnace directly with micropipet and chromium peak area is measured. Total Cr is determined with GFAAS directly. The detection limits for Cr(Ⅵ) and total Cr are 0. 01μg/L and 0. 2μg/L respectively. The method has been used in nature water analysis with good precision and recovery.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1990年第12期1142-1144,共3页
Chinese Journal of Analytical Chemistry
关键词
铬
形态分析
双颗粒树脂法
AAS
Chromium Speciation analysis
Double anion exchange beads
Graphite furnace atomic absorption spectrometry
