Quality Control and Detection Methods of Water Treatment Chemicals

The quality of water treatment chemicals directly affects the effect of water treatment, the safety of water quality, and the operation of treatment equipment. Therefore, strict quality control and accurate detection of water treatment chemicals are essential to ensure their performance and safety. This article introduces the key quality indicators of water treatment chemicals, common detection methods, and quality control measures.

The key quality indicators of water treatment chemicals vary according to their types. For coagulants and flocculants, the main indicators include purity, effective component content, turbidity removal rate, and flocculation speed. For corrosion and scale inhibitors, the key indicators include corrosion inhibition rate, scale inhibition rate, and thermal stability. For biocides and disinfectants, the main indicators include sterilization efficiency, residual concentration, and toxicity. For green water treatment chemicals, additional indicators such as biodegradability and ecotoxicity are required.

Common detection methods of water treatment chemicals include chemical analysis, instrumental analysis, and biological detection. Chemical analysis methods, such as titration, gravimetry, and colorimetry, are simple and low-cost, suitable for the detection of basic indicators. Instrumental analysis methods, such as high-performance liquid chromatography (HPLC), gas chromatography (GC), and inductively coupled plasma mass spectrometry (ICP-MS), have high accuracy and sensitivity, suitable for the detection of trace components and impurities. Biological detection methods, such as microbial inhibition tests and aquatic toxicity tests, are used to evaluate the sterilization effect and environmental safety of chemicals. To ensure the quality of water treatment chemicals, strict quality control measures should be taken in the production process, including raw material inspection, process control, and finished product testing. In addition, regular inspection and calibration of detection equipment are necessary to ensure the accuracy of detection results.