Monitoring of toxic elements in wastewaters and effluents according to governmental regulations is getting more important. Total reflections X-ray fluorescence (TXRF) analysis is a rapid and cost-efficient analytical method without need for sophisticated lab infrastructure.
International decrees strictly regulate the discharge of sewage. Testing for heavy metals is sewage by conventional methods, such as ICP, requires complete digestion of the sample using hazardous chemicals. This time-consuming and destructive sample preparation step can be omitted when using a TXRF spectrometer. Untreated sewage can be diluted with a detergent solution and measured immediately after the addition of an internal standard.
Key elements (e.g. chromium, arsenic, lead) are detectable far below usual threshold values. The simple sample preparation leads to quick results and allows immeadiate, continuous monitoring of sewage treatment.