This standard specifies the detection methods of mercury, cadmium and lead in battery.
This standard is applicable to the determination of mercury, cadmium and lead in small sealed primary batteries which meet the standard of GB/T8897.2 and with single battery mass of not more than 200g.
Determination range: mercury content is 0.05 μg/g ~ 100 mg/g; cadmium content is 1.0 μg/g ~ 100 mg/g; lead content is 5.0 μg/g ~ 100 mg/g.
Note: The lower limit of the determination range of each element varies with the precision performance of the apparatus and the dilution multiple when preparing the sample solution. If the total volume of sample solution is reduced or the sample weighing amount is increased, the lower limit of the determination range of mercury, cadmium and lead may be reduced. For example, on the premise that the precision performance of the apparatus meets the requirements of this standard, when the total volume of the sample solution is half of that in “Table 1 Mass range, model example of battery and added reagent amount”, the lower limit of the determination range is: 0.025μg/g of mercury, 0.5μg/g of cadmium, 2.5μg/g of lead; the lower limit of the determination range is 0.01μg/g of mercury, 0.2μg/g of cadmium and 1.0μg/g of lead when the dilution multiple is 5 in case of preparing sample solution (when the battery sample mass is 20g, and the total volume of the sample solution is 100mL).
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 603 Chemical reagent - Preparations of reagent solutions for use in test methods
GB/T 6682-2008 Water for analytical laboratory use - Specification and test methods
GB/T 8897.2 Primary batteries - Part 2: Physical and electrical specifications
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3 Test method - General
After stripped, the battery is decomposed with nitric acid and hydrochloric acid and then filtered to prepare the sample solution. Method I cold atomic absorption spectrometric methods (AAS) or method II atomic fluorescence spectrometry is adopted to determine the content of mercury, and method III flame atomic absorption spectrometry or method IV inductively coupled plasma atomic emission spectrometry is adopted to determine the contents of lead and cadmium.
GB/T 20155-2018 The following standards are cited：
