GB/T 742-2018 "Paper-making raw materials, pulp, paper and board — Determination of residue (ash) on ignition (at 575℃ and 900℃)" applies to paper-making raw materials, pulp, paper, and board, specifying methods for determining residue (ash) on ignition at two temperatures: 575℃ and 900℃. The sample is placed in a muffle furnace and ignited at the specified temperature until constant mass is achieved. The ash content is calculated based on the mass difference before and after ignition. The standard clarifies sample pretreatment, ignition conditions, determination of constant mass, and result calculation methods, distinguishing the requirements for measurements at different temperatures to ensure accurate ash determination.
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 | 2018-12-28 00:00:00 | Implementation Date | 2019-07-01 00:00:00 |
