T/NMRJ 006-2024 Water quality: Determination of lead and cadmium by graphite furnace atomic absorption spectrometry

Scope

Scope: This document specifies the graphite furnace atomic absorption spectrometry method for the determination of lead and cadmium in water. This document is applicable to the determination of total lead, soluble lead, and total cadmium, soluble cadmium in surface water, groundwater, and wastewater. When the sampling volume is 50 ml, the set volume is 50 ml, and the injection volume is 20 μl, the method detection limit for total lead and soluble lead is 0.9 μg/L, and the determination limit is 3.6 μg/L; the method detection limit for total cadmium and soluble cadmium is 0.05 μg/L, and the determination limit is 0.20 μg/L. Main technical content: To meet the requirements of standards such as the "Surface Water Environmental Quality Standards" (GB 3838-2002), the "Groundwater Quality Standards" (GB/T 14848-2017), and the "Integrated Wastewater Discharge Standards" (GB 8978-1996) for the determination of lead and cadmium, this document aims to confirm through experimental verification of actual water samples that this method is suitable for the determination of lead and cadmium in surface water, groundwater, and wastewater. Through the formulation of this document, the detection limit, determination limit, precision, and accuracy of lead and cadmium can be determined, which can meet the requirements of environmental quality standards for groundwater, surface water, and wastewater.

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