摘要
研究了一种在密闭容器内进行微波湿法消解进而用二苯卡巴肼分光光度法测定土壤中微量铬的方法， 对微波消解的程序和溶剂等进行了试验和优化。与传统消解法相比，该法具有操作简便、省时、不沾污样品和 不污染环境等优点。样品分析结果的相对标准偏差约为０．５％（ｎ＝８），加标回收率为９７．５％－ ９９．０％，与国家
A method for the determination of trace amount of chromium in soil was developed by diphenylcarbazide spectrophotometry with microwave digestion under pressure in a closed vessel. The ef- fects of such factors as program of microwave digestion, solvents on the analytical results were studied and analytical conditions optimized. Compared with the methed of traditional digestion, this method has the advantages of operating easy, saving time, no contaminating the sample and the environment, etc. The relative standard deviation is about 0.5% (n = 8) and the recovery is in the range of 97.5% - 99. 0%. The analyzed result of chromium in soil sample by this method was in good agreement with that obtained by the method of GB15618 - 1995.
出处
《分析测试学报》
CAS
CSCD
2000年第6期84-86,共3页
Journal of Instrumental Analysis
基金
江苏省自然科学基金资助项目([1999]005)
关键词
土壤
铬
二苯卡巴肼
分光光度法
污染物分析
Soil
Chromium
Microwave digestion
Diphenylcarbazide
Spectrophotometry
