The objective of this project is to implement the verification of the analytical methods of cyanide and phenol in drinking water. Based on the methods promulgated by EPA (Method 410.1 for cyanide and Method NIEA W521.20T for phenol) drinking water were sampled from Kaohsiung and Pingtung areas were analyzed for cyanide and phenol. It is expected that results from this project will serve as the basis of modifying the standard methods of analyzing cyanide and phenol in drinking water. Results from this research indicate: (1)for cyanide: In the analysis of cyanide in drinking water, most common interferences come from chlorine and nitrate, and these interferences can be effectively overcome by adding sodium thiosulfate and sulfamic acid. In Ihe range of 0-200μg/L as CN, calibration curves with very good linear relationship (r2≧0.999) can be achieved, but for most of the cases there are intercepts of 2-3μg/L CN. Under the conditions of lower standard cyanide solulions (0-20 or 0-50μg/L CN), the#r#value of meeting the QA/QC criteria can still be achieved, and the intercept become lower. It was found that, under this analylical melhod, the MDL (method detection method) was 3-4μg/L CN, and this was lower than the drinking water standard of 10μg/L CN: For most of the samples from Kaohsiung and Pingtung areas, the cyanide levels were below the MDL, and thus can be regarded as non-detectable(ND). Overall, verification of this method in the analysis of cyanide from drinking water is satisfactory. (2) for phenol: The Shimadzu $pectrophotomer Model UV-160A was used for the analysis of phenol from drinking water following the EPA Method NIEA W521.20T. Under the following conditions: 1 cm light path 460 nm wave length Standard solutions of 3-35μg/L as phenol (calibration curve:Y=0.54+275.07X, r2=0.998),

Cyanide compounds,examination of water quality,Method detection limit,Colorimetric method