Application This method is applicable to wastewater with cadmium concentrations within the range of 0–5 mg/L. Technical Parameters Measurement Method Dithizone spectrophotometric method Measurement Range 0–2 mg/L (OEM: 0–5 mg/L) Accuracy ≤ ±10% Repeatability ≤ ±5% Measurement Cycle Minimum cycle is 30 minutes; color development time can be adjusted flexibly between 5–30 min based on environmental conditions. Sampling Cycle Adjustable time interval (10–9999 min) or on-the-hour