摘要
本文介绍了一种在密闭容器内，进行微波消解、快速测定环境水样中化学需氧量的新方法，并研究了微波功率、消解时间、酸度等因素对分析结果的影响。对不同水样的化学需氧量进行了测定，与标准Ｋ＿２Ｃｒ＿２Ｏ＿７回流法相对照，大大提高了分析速度，用Ｆ检验法及ｔ－检验法检验，没有显著性差异。水样的分析结果表明：ＲＳＤ４．２％，加标回收率为９６．７％～１１０％，结果令人满意。
This paper introduced a new methodfor high-speed measurement of COD_(cr) con-tent in environmental water samples by us-ing microwave-heating digestion underpressure in a closed vessel.The effects ofsuch factors as microwave-power,time andacidity,etc,on the analytical results werestudied.Different water samples were ana-lved,and compared with the sesults ob-tained by thestandard method.There is nosignificant difference:ccording to F-testand t-test.The RSD≤4.2%and the recov-ery is 96.7%～110%,The results are satis-factory.This method hase the advantagesof easy operation,time and labour savingand low cost,In addition,it does not pollutethe environment,and is appropriate forbatch analysis and easy to popularige,etc,
出处
《分析试验室》
CAS
CSCD
北大核心
1995年第6期60-63,共4页
Chinese Journal of Analysis Laboratory
关键词
环境水样
化学需氧量
微量波消解
Microwave-heating
Diges-tion method under pressure
environmentalwater samples
Chemical oxygen demand
