摘要
研究了新显色剂2 (四氮唑偶氮) 5 二乙氨基苯甲酸(TTZDBA)与铜显色反应的条件。结果表明,在pH4 0的HAc NaAc缓冲溶液中,TTZDBA与Cu2+形成稳定的紫红色络合物,其最大吸收波长在570nm处,表观摩尔吸光系数为4 08×104,Cu2+质量浓度在0～0 4mg/L范围内符合比尔定律。所拟方法可不经分离直接测定镁合金和铝合金标样中的微量铜,加标回收率100 8%～102 1%,RSD(n=6)在1 8%～4 2%,结果令人满意。
The conditions of color reaction of a new reagent 2(tetrazolylazo)5diethylaminobenzoic acid(TTZDBA)with copper*'were presentedThe results showed that the new color reagent reacts with copper*'to form a stable purple red complex in the buffer solution of HAcNaAc(pH40)The apparent molar absorptivity was 408×104L·mol-1·cm-1 and maximum absorption wavelength was at 570nmBeer's law is obeyed in the range of 0-04mg/L for Cu2+The method has been used for the direct determination of copper in aluminium alloys and magnesium alloy with satisfactory resultsThe recovery of standard addition and RSD were 1008%-1021% and 18%-42%(n=6),respectively
出处
《冶金分析》
CAS
CSCD
北大核心
2003年第3期14-16,共3页
Metallurgical Analysis
基金
浙江省分析化学重点扶植学科项目(浙教高科200337)
关键词
镁合金
铝合金
铜
二乙氨基苯甲酸
光度法
测定
2-(tetrazolylazo)-5-diethylamino-benzoic acid
spectrophotometry
copperⅡ,
