GB/T 39560.4-2021: Determination of certain substances in electrical and electronic products - Part 4: Mercury in polymers, metals and electronics by CV-AAS, CV-AFS, ICP-OES and ICP-MS

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Scope

This Part of GB/T 39560 describes test methods for mercury in polymers, metals and electronics
by CV-AAS, CV-AFS, ICP-OES and ICP-MS.
This Part specifies the determination of the levels of mercury (Hg) contained in electrotechnical
products. These materials are polymers, metals and electronics (e.g., printed wiring boards,
fluorescent lamps, mercury switches). Batteries containing Hg should be handled as described
in [1]. The interlaboratory study has only evaluated these test methods for plastics, other matrices
were not covered.
This Part refers to the sample as the object to be processed and measured. What the sample is
or how to get to the sample is defined by the entity carrying out the tests. Further guidance on
obtaining representative samples from finished electronic products to be tested for levels of
regulated substances may be found in IEC 62321-2. It is noted that the selection and/or
determination of the sample may affect the interpretation of the test 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 procedures for preparing the sample solution from which the
most appropriate method of analysis can be selected by experts.
Analysis by CV-AAS, CV-AFS, ICP-OES and ICP-MS allows the determination of the target
element, mercury, with high precision (uncertainty in the low per cent range) and/or high
sensitivity (down to the μg/kg level). The test procedures described in this standard are intended
to provide the highest level of accuracy and precision for concentrations of mercury in the range
from 4 mg/kg ~ 1 000 mg/kg. The procedures are not limited for higher concentrations.
For direct analysis, using thermal decomposition-gold amalgamation in conjunction with CV-
AAS (TD(G)-AAS) can be also applied for mercury analysis without sample digestion,
although the detection limits are higher than other methods due to the reduced sample size.

Basic Data

Standard ID	GB/T 39560.4-2021 (GB/T39560.4-2021)
Description (Translated English)	Determination of certain substances in electrical and electronic products - Part 4: Mercury in polymers, metals and electronics by CV-AAS, CV-AFS, ICP-OES and ICP-MS
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	L10
Word Count Estimation	22,267
Issuing agency(ies)	State Administration for Market Regulation, China National Standardization Administration