GB/T 39560.4-2021 Active

This part of GB/T 39560 uses CV-AAS, CV-AFS, ICP-OES, and ICP-MS methods to determine mercury in polymers, metals, and electronic components.
This part specifies the determination of mercury (Hg) content in electronic and electrical products. These materials may include polymers, metals, and electronic components (such as printed circuit boards, fluorescent lamps, and mercury switches). Mercury-containing batteries are handled according to reference [1]. International laboratory method studies only evaluated the detection methods for plastics, without involving other types of matrices.
In this part, samples refer to the objects processed and detected. What the samples are and how to obtain them are determined by the institutions conducting the detection. For the detection of the content of restricted substances in electronic products, further guidance on obtaining representative samples from them can be found in IEC 62321-2. It is worth noting that the selection and/or determination of samples may affect the interpretation of the detection results.
This part describes the use of four methods, namely CV-AAS (cold vapor atomic absorption spectrometry), CV-AFS (cold vapor atomic fluorescence spectrometry), ICP-OES (inductively coupled plasma optical emission spectrometry), and ICP-MS (inductively coupled plasma mass spectrometry), as well as several methods of preparing sample solutions, from which the most suitable analytical method can be selected.
The determination of the target element - mercury using CV-AAS, CV-AFS, ICP-OES, and ICP-MS is characterized by high accuracy (small uncertainty) and/or high sensitivity (low detection limit down to the μg/kg level). The test steps described in this part can determine mercury in the range of 4 mg/kg to 1000 mg/kg with high accuracy and precision. These methods are also suitable for the determination of higher mercury content.
The method of thermal decomposition-gold mercury amalgamation CV-AAS