GB/T 40272-2021 "Paper, board, pulps and cellulose nanomaterials—Determination of acid-soluble magnesium, calcium, manganese, iron, copper, sodium, potassium" is applicable to paper, board, pulps, and cellulose nanomaterials. It specifies the methods for determining seven acid-soluble elements: magnesium, calcium, manganese, iron, copper, sodium, and potassium. The standard defines technical requirements for sample pretreatment, acid dissolution conditions, instrument operation, and result calculation. It standardizes the relevant testing procedures to ensure the accuracy and reliability of the determination results for each element.
This summary is not the original standard text and is for reference only. For accurate information, please obtain it through official channels.
| Status | Active | ||
|---|---|---|---|
| CCS | Y30 | ICS | 85.010 |
| Release Date | 2021-05-21 00:00:00 | Implementation Date | 2021-12-01 00:00:00 |