GB/T 20155-2018Determination of mercury, cadmium and lead in battery (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This standard replaces GB/T 20155-2006 "Determination of mercury, cadmium and lead in batteries".

Compared with GB/T 20155-2006, the main technical changes of this standard are as follows.

--- Revised the scope of application of the standard (see Chapter 1);

--- Increased handling of battery pack samples (see 6.2);

--- Revised "Ammonia content determination cold atomic absorption spectrometry AAS" (see Chapter 7, 2006 edition 2.1);

--- Added "Measurement of cadmium and lead content by flame atomic absorption spectrometry FAAS" (see Chapter 9, 2006 and 2.2 and 2.3).

1 Scope

This standard specifies the detection method for mercury, cadmium and lead in batteries.

This standard is applicable to the determination of the content of mercury, cadmium and lead in small sealed primary batteries complying with GB/T 8897.2 whose single cells have a mass of not more than 200g.

Measurement range. mercury content 0.05µg/g~100mg/g; cadmium content 1.0µg/g~100mg/g; lead content 5.0µg/g~100mg/g.

Note: The lower limit of the measurement range of each element varies with the precision performance of the instrument and the dilution factor at the time of preparation of the sample solution. Reduce the total volume of the sample solution or Increasing the sample weight can reduce the lower limit of the measurement range of mercury, cadmium and lead. For example, when the accuracy of the instrument meets the requirements of this standard, when the sample is When the total volume of the solution is half of the "Table 1 battery mass range, model example and reagent amount added", the lower limit of the measurement range is. mercury 0.025 µg/g, Cadmium 0.5µg/g, lead 2.5µg/g; when the sample solution is prepared with a dilution factor of 5 (battery sample mass 20g sample solution total volume 100mL), measured The lower limit of the range is. mercury 0.01 µg/g, cadmium 0.2 µg/g, lead 1.0 µg/g.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 603 Chemical reagent test method - Preparation of preparations and products used

GB/T 6682-2008 Analytical laboratory water specifications and test methods

GB/T 8897.2 Primary batteries Part 2. Dimensions and electrical performance requirements

3 Test Methods---Summary

After the battery was dissected, the sample solution was prepared by decomposing with nitric acid and hydrochloric acid and filtering. Method 1 - Cold Atomic Absorption Spectrometry or Method 2 Determination of mercury content by sub-fluorescence spectroscopy, method three flame atomic absorption spectrometry or method four inductively coupled plasma atomic emission Spectrometric determination of lead and cadmium content.

4 Test conditions