GB/T 37861-2019 in English

1. Background and significance of standard formulation

With the development of the electronic and electrical industry, environmental protection requirements are becoming increasingly stringent, and limiting the use of halogens has become a global consensus. This standard aims to standardize the detection methods of fluorine (F), chlorine (Cl), and bromine (Br) in electronic and electrical products to ensure that product quality complies with environmental protection regulations.

2. Analysis of key technical points

2.1 Sample pretreatment process

• Oxygen bomb combustion method: Place the sample in an oxygen bomb and burn it at high temperature to generate hydrogen halide.
• Preparation and use of absorption liquid: Ensure that the absorption liquid matches the eluent and prepare it before use.

2.2 Calibration curve drawing

Use the external standard method to prepare standard solutions of different concentrations and draw the standard curve with a correlation coefficient of ≥0.999.

3. Implementation Recommendations

3.1 Operation Precautions

• Ensure that the instrument is calibrated regularly, especially the elution system and detector of the ion chromatograph.
• Avoid halogen contamination during sample handling. It is recommended to use halogen-free experimental equipment.

3.2 Quality Control Measures

Each batch of samples should contain at least blank samples and spiked samples to ensure data reliability. Repeatability ≤5%, if out of range, reanalysis is required.

4. Explanation of Professional Terms

4.1 Homogeneous Materials

Materials composed of one or more substances with uniform parts to ensure representative sample test results.

4.2 Reference Materials (CRM)

Reference materials with certification documents from authoritative organizations are used for method validation and quality control.