What is COD standard solution

COD detector standard solution, also known as standard substance, is a matrix that simulates natural freshwater components and is precisely prepared through special processes in a specific environment. Its chemical oxygen demand (COD) concentration is known. Customers can also purchase or prepare as needed. The main uses of standard solutions are as follows:

① Determine and evaluate the analysis process of the operator;

② Check the accuracy of COD meter;

③ Calibrate COD meter curve;

④ Quality control throughout the entire measurement process.

COD detector standard stock solution: Use 50000 mg/L standard substance as the stock solution. During use, the detection instrument can be gradually diluted as needed to obtain standard solutions of different concentrations, and stored under specified conditions. Strictly follow the instructions and handle with care.

1. Standard solution 1: Accurately transfer 100mL of standard stock solution into a 100mL volumetric flask, dilute to the mark with distilled water, and mix thoroughly. A solution of a solution. The COD concentration is 500mg/L. Check and calibrate the equipment.

2. Standard solution 2: Accurately measure 200mL of standard solution 1, transfer it to a 1000mL volumetric flask, dilute to the mark with distilled water, and mix well. A solution in a solution. The COD concentration is 100mg/L, used for equipment detection and calibration.