Yushan COD Sensor Calibration Tool

Yushan UV254 COD Sensor Calibration Tool:
1. Distilled water or deionized water (Watsons distilled water);
2. 1500mg/L potassium hydrogen phthalate mother liquor (available from Yushan);
>>150mg/L potassium hydrogen phthalate standard solution preparation (take 100 mL of this solution and inject it into a flask with a capacity of 1000 mL, then pour distilled water or deionized water to the mark.). Shake well to ensure a COD content of 150 mg/L. ）
>>The preparation of 450mg/L potassium hydrogen phthalate standard solution is as follows.