火焰原子吸收分光光度法测定水中铜的含量

Determination of the Copper in Water Samples with Flan Atomic Absorption Spectrophotometny

选用火焰原子吸收分光光度法测定水样中铜。将样品或消解处理过的样品直接吸入火焰,在火焰中形成的原子蒸汽对光源发射的特征电磁辐射产生吸收。将测得的样品吸光度和标准溶液的吸光度进行比较,确定样品中被测元素(铜)的含量。试验结果表明:在0.05～2.50 mg/L浓度范围内,体系吸光度值与铜浓度呈良好的线性关系(相关系数>0.999),检出限0.013 mg/L,实际样品加标回收率在91.7%～105.5%,可用于水中铜的定量检测[1]。

Flame atomic absorption spectrophotometny （FAAS） was selected to determine the copper in water sam- pies. The samples or the digestion treated samples were directly inhaled flame. The atomic vapor was formed in the flame produced absorption to the electromagnetic radiation, which was the characteristic of light source emission. The measured absorbance of the sample and the absorbance of the standard solution to determine the content of the element - copper to be measured in the sample were compared. The test results showed that the system absorbance and copper concentration had a good linear relation of 0. 05 -2. 50 mg/L, and the correlation coefficient was more than 0. 999. Only when the con- centration range was 0. 013 mg/L and the actual spiked recovery was 91.7% - 105.5%, it can be used as the quantita- tive detection of copper in water.