摘要
研究了显色剂偶氮氯磷Ⅰ双峰双波长光度法测定水样中的钙 (Ⅱ )。方法结果表明 :在PH 值为 10 5时 ,钙 (Ⅱ )与偶氮氯磷Ⅰ形成 1∶1的红色络合物 ,在 5 80nm处有最大吸收 ,参比波长为 5 2 0nm。方法的线性范围为 0～ 2 5 μg/2 5mL ,回收率为 98～ 10 1% ,表观摩尔吸光系数ε′ =2 66× 10
Dual-wave length spectrophotometry of the color reaction of calcuim(Ⅱ) in water with CPA(Ⅰ) is reported CPA(Ⅰ) reacts with calcuim ion in a medium of 10 5 P H to form a stable red complex with component ratio of 1∶1 The sabsorption maxima lies at 580nm Beers law holds in the concentration range of calcium 0～25μg/25 ml ε′is 2 66×10 4L·mol -1 ·cm -1 The proposed methed is proved to be selective?rapid and convenient
出处
《四川工业学院学报》
2002年第1期68-70,共3页
Journal of Sichuan University of Science and Technology
