GB/T 44331-2024 in English

Interpretation of GB/T 44331—2024 High-Purity Lithium Borate Standard

1. Overview and Background of the Standard

GB/T 44331—2024 High-Purity Lithium Borate specifies the classification and labeling, technical requirements, test methods, inspection rules, etc. of high-purity lithium borate. It is applicable to high-purity lithium borate used as a flux in instruments such as X-ray fluorescence spectrometry (XRF), flame atomic absorption spectrometry (AAS), and inductively coupled plasma emission spectrometry (ICP).

2. Classification and Labeling

3. Technical requirements

The technical requirements for high-purity lithium borate include chemical composition, ignition loss and bulk density, as follows:

• Chemical composition: the main content (mass fraction) is not less than 99.99%, and the impurity content (such as Si, P, As, etc.) is not more than 0.001%.
• Loss on ignition: should be less than 0.40%.
• Bulk density: low-density products are 0.5-0.7 g/cm³, and high-density products are 0.9-1.5 g/cm³.

4. Test methods

The test methods include the determination of chemical composition, loss on ignition and bulk density, as follows:

• Chemical composition: X-ray diffraction (Appendix A) and flame atomic absorption spectrometry (Appendix BF).
• Loss on ignition: Determined according to the method specified in Appendix H.
• Bulk density: Refer to GB/T 1479.1-2011 standard method.

5. Inspection rules

Inspection rules include batching, sampling and result determination:

• Each batch of products shall not exceed 500 kg.
• The sampling method adopts the quartering method, and the total sample volume shall not be less than 400 g.
• If the inspection result is unqualified, double sampling shall be required for retesting.

6. Implementation suggestions