GB/T 8943.4-2008
Paper boaed and pulp.Determination of calcium and magnesium (English Version)
- Standard No.
- GB/T 8943.4-2008
- Language
- Chinese, Available in English version
- Release Date
- 2008
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Latest
- GB/T 8943.4-2008
- Replace
- GB/T 8943.4-1988
- Scope
- warn! In the method specified in this part of GB/T 8943, certain dangerous chemicals need to be used, which can form explosive gas with air, so care must be taken to ensure compliance with relevant safety precautions. This part of GB/T 8943 specifies two methods, namely EDTA complexometric titration (method A) and flame atomic absorption spectrophotometry (method B), to determine the content of calcium and magnesium in paper, cardboard and pulp. Flame atomic absorption spectrophotometry (Method B) should be used. When the content of calcium and magnesium in paper, cardboard and pulp is greater than 200mg/kg, EDTA complexometric titration (method A) can be used. This section applies to the determination of calcium and magnesium content in various paper, cardboard and pulp.
GB/T 8943.4-2008 Referenced Document
- GB/T 450 Paper and board.Sampling for testing and identification of machine and cross direction,wire side and felt side*， 2008-08-19 Update
- GB/T 462 Determination of moisture content of analytical samples of paper, paperboard and pulp*， 2023-09-07 Update
- GB/T 740 Pulps-Sampling for testing
- GB/T 741 Pulps--Determination of moisture content
- GB/T 742 Fibrous raw material, pulp, paper and board—Determination of residue(ash) on ignition at 575℃ and 900℃*， 2018-12-28 Update
GB/T 8943.4-2008 history
- 2008 GB/T 8943.4-2008 Paper boaed and pulp.Determination of calcium and magnesium
- 1988 GB/T 8943.4-1988 Pulp and paper--Determination of calcium and magnesium
