GB/T 623-2024 in English
VALIDChemical reagent—Perchloric acid
- Issued on:2024-09-29
- Implemented on:2025-04-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$204.00
《GB/T 623-2024化学试剂 高氯酸》由TC63（全国化学标准化技术委员会）归口，TC63SC3（全国化学标准化技术委员会化学试剂分会）执行，主管部门为中国石油和化学工业联合会。
Introduction
1. Standard Overview
GB/T 623-2024 "Chemical Reagent Perchloric Acid" is a national standard of the People's Republic of China, which is used to regulate the properties, technical requirements, test methods and packaging marks of perchloric acid. This standard replaces the previous GB/T 623-2011 version and has made important updates to the determination methods of manganese, iron, copper, silver and lead as well as packaging marks.
2. Comparison of Technical Requirements
| Item | Superior grade | Analytical grade |
|---|---|---|
| Perchloric acid (HClO4), w/% | 70.0～72.0 | 70.0～72.0 |
| Chroma, Hessian units | ≤10 | ≤15 |
| Ethanol insoluble matter, w/% | ≤0.001 | ≤0.002 |
3. Interpretation of experimental methods
Determination of perchloric acid content:Weigh 5 g of sample, pour into a stoppered weighing bottle, add water to dissolve, and titrate with sodium hydroxide standard titration solution. Calculate the mass fraction by the formula: w = (VcMm × 100%).
Colorimetric determination:According to GB/T 605, take 50 mL of sample for colorimetric comparison.
Ignition residue determination:Weigh 40 g of sample, ignite at high temperature in a quartz dish to constant weight, and calculate the result according to GB/T 9741-2008.
4. Implementation suggestions
- Strictly follow the test methods specified in the standard to ensure data accuracy.
- Pay attention to safe operation, perchloric acid is highly corrosive and oxidizing.
- Refer to the latest technical requirements and packaging marking regulations during procurement and production.
Loading PDF document...
Error loading PDF. Please make sure the file is valid and try again.
We also recommend
-
GB/T 15355-2008 in English
Chemical reagent - Nickel chloride hexahydrate
2008-05-15 -
GB/T 625-2024 in English
Chemical reagent—Sulfuric acid
2024-09-29 -
GB/T 631-2026 in English
Chemical reagent—Ammonia solution
2026-02-27 -
GB/T 620-2011 in English
Chemical reagent—Hydrofluoric acid
2011-05-12 -
GB/T 2304-2008 in English
Chemical reagent - Zinc granular free from arsenic
2008-05-15 -
GB/T 1396-2015 in English
Chemical reagent―Ammonium sulfate
2015-07-03 -
GB/T 9853-2008 in English
Chemical reagent - Sodium sulfate anhydrous
2008-05-15
