摘要
在pH10.4～11.1碱性溶液中钙离子与紫尿酸铵生成橙红色的稳定络合物.络合物最大吸收峰为500nm,显色后络合物可稳定2时.钙量在2.50～25.0(μg/50ml)范围内符合比耳定律,表观摩尔吸光系数为1.2×10~4L/mol·cm.桑德尔灵敏度为0.003μg/cm^2,方法加标回收率为94％～104％.
Calcium reacts with murcxidc in alkaline solution (pH 10.4-11.1) to form a stable orange complex with an absorption maximum at 500nm. Beer's law is obeyed in the concentration range 2.50-25.0 μg/ 50ml copper. The molar absorptivity is 1.2 × 104L · mol-1cm-1. The sensibility is 0.003μg / cm2. The recovery ratio is 94-104%.
出处
《干旱环境监测》
1991年第4期220-224,259-260,共5页
Arid Environmental Monitoring
