GB/T 22787-2008Determination of essential parameters of cryolite for use in fireworks and firecrackers (English PDF)

Foreword

Appendix A of this standard is an informative annex. The standard proposed by China National Light Industry Council. This standard by the National Standardization Technical Committee of fireworks. This standard was drafted. Guangxi CIQ fireworks testing center. The main drafters of this standard. Suppliers Jie, Wu Junyi, Li Yiming and Xiao rejuvenation. Fireworks and firecrackers - Determination of cryolite key indicators

1 Scope

GB/T 22787-2008 is the Chinese national standard on determination of essential parameters of cryolite for use in fireworks and firecrackers, in the field of chemical technology. The /T suffix marks it as a recommended standard: it is not compulsory by itself, but it becomes binding as soon as a contract, a tender or a customer specification calls it up - which in practice is how most foreign buyers meet it. It was issued on 30 December 2008 by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China; Standardization Administration of China, and has been in force since 1 September 2009. Classification: ICS 71.100.30, CCS Y88. This page is published from the official record of the standard held by the Chinese standards administration: the identification, the dates, the classification and the issuing body are taken from there. The clause text, the tables and the numeric limits are in the document itself, which is delivered complete in English translation.

This standard specifies the fireworks with sulfuric acid insoluble content cryolite, moisture content, moisture absorption, fineness, aluminum content, iron content and has Active ingredient (sodium content) measurement method. This standard applies to fireworks insoluble content, moisture content, moisture absorption, fineness, content of aluminum, iron sulfate content by cryolite and effective Ingredient (sodium content) determination.

2 Normative references

The following documents contain provisions which, through reference in this standard to become the standard terms. For dated references, all subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to study under this agreement is standard Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. Preparation of

GB/T 601 chemical reagent standard titration solution General Method

GB/T 3049 Industrial chemicals determination of iron content 1,

10 Philippines spectrophotometry method ( GB/T 3049- 2006, ISO 6685. 1982, IDT)

GB/T 6003.1 woven wire mesh test sieve ( GB/T 6003.1-1997, neq ISO 3310-1.1990)

GB/T 6682 analytical laboratory use specifications and test methods ( GB/T 6682-2008, ISO 3696. 1987, MOD)

GB/T 8170 repair value expressed about the rules and limit values \u200b\u200band judgment