水中氰化物快速测定的方法探讨

摘要

利用CN－在苯偶姻缩合反应中的催化作用建立催化快速法，结合测试管法与便携式分光光度法的优势，提出新型氰化物快速定量测定法，并优化该方法的试验条件，使方法在0 mg／L ～0．200 mg／L范围内线性良好，检出限为0．005 mg／L。将该方法用于测定氰化物有证标准物质，6次测定结果的RSD为0．5％～2．6％，实际水样的加标回收率为85．0％～110％。该方法与国标法的比对试验表明，2种方法测定结果无显著性差异。%Using catalysis of CN-in benzoin condensation combined with portable spectrophotometry and testing-tube method, a new catalytic rapid method was established and was optimized.The method showed good linearity in concentration ranged from 0 mg/L to 0.200 mg/L with the detection limit 0.005 mg/L.The application of this method for a certified standard material determination showed that the RSDs of six measures ranged from 0.5%to 2.6%, and the recoveries of practical water samples were 85.0%~110%.This method had no significant differences with national standard method.