GB/T 26525-2022
Refined cobaltous chloride (English Version)
- Standard No.
- GB/T 26525-2022
- Language
- Chinese, Available in English version
- Release Date
- 2022
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Latest
- GB/T 26525-2022
- Replace
- GB/T 26525-2011
- Scope
- This document specifies the requirements, test methods, inspection rules and signs, labels, packaging, transportation and storage of refined cobalt chloride. This document applies to refined cobalt chloride. Note: This product is mainly used in electroplating and batteries, catalysts, pharmaceutical raw materials and other industries.
- Introduction
Analysis of core changes in the standard revision
Technical indicators Requirements of the 2011 version Changes in the 2022 version Impact analysis Determination of cobalt content Complexometric titration only Potentiometric titration (arbitration method) added Increase detection accuracy to ±0.1% Impurity control 10 metal ions 7 new indicators including Al/Si/P Magnetic foreign matter ≤70μg/kg Detection method Atomic absorption method is the main method ICP-OES is uniformly adopted Multi-element simultaneous detection
Key technical indicators comparison
Core parameter requirements for superior products:
- Cobalt content ≥24.2% (potentiometric titration method)
- Nickel ≤0.001%, copper ≤0.0005%
- Newly added magnetic foreign matter control ≤50μg/kg
- Mercury content is determined by cold atomic absorption method (arbitration)
Innovation of detection method
Potentiometric titration method (6.3.1)
Potassium hexacyanoferrate (III) oxidation system is used, and endpoint determination is achieved through a platinum-tungsten electrode system, with a relative deviation of ≤0.2%. Calculation formula:
w1 = [(V1cM - V2ρ)×10-3]/(25m/250)×100%
ICP-OES multi-element detection (6.4)
Recommended analysis line wavelength:
- Ni 231.604nm
- Fe 239.563nm
- Al 396.152nm
Requirements for the management of hazardous chemicals
According to the "Catalogue of Hazardous Chemicals" (2015 edition):
- Operators must have laboratory qualifications
- Equipped with emergency flushing equipment
- Waste liquid treatment must comply with the specifications in Appendix A
Industry application recommendations
In the preparation of lithium battery positive electrode materials:
- Preferably select high-quality products (Ni≤0.001%)
- Monthly random inspections are recommended for magnetic foreign matter detection
- Atomic fluorescence method is used for retesting mercury content
GB/T 26525-2022 Referenced Document
- GB/T 6682-2008 Water for analytical laboratory use.Specification and test methods
- GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values
- HG/T 3696.1 Inorganic chemicals for industrical use Preparations of standard and reagent solutions for chemical analysis.Part 1:Preparations of standard volumetric solutions
- HG/T 3696.2 Inorganic chemicals for industrical use.Preparations of standard and reagent solutions for chemical analysis.Part 2: Preparations of standard solutions for impurity
- HG/T 3696.3 Inorganic chemicals for industrical use.Preparations of standard and reagent solutions for chemical analysis.Part 3: Preparations of reagent solutions
GB/T 26525-2022 history
- 2022 GB/T 26525-2022 Refined cobaltous chloride
- 2011 GB/T 26525-2011 Refined cobaltous chloride