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ISO 21438-2:2009
Workplace atmospheres — Determination of inorganic acids by ion chromatography — Part 2: Volatile acids, except hydrofluoric acid (hydrochloric acid, hydrobromic acid and nitric acid)- 발행일 : 2009-12-04
- 발행기관 : ISO
상세정보
| 분야 | ISO/TC 146/SC 2 : Workplace atmospheres |
|---|---|
| 적용범위 | ISO 21438-2:2009 specifies a method for the determination of the time-weighted average mass concentration of hydrogen chloride (HCl) gas and hydrochloric acid mist, hydrogen bromide (HBr) vapour and hydrobromic acid mist and nitric acid (HNO3) vapour and mist in workplace air by collection on an alkali-impregnated quartz fibre filter and analysis by ion chromatography. For mist sampling, the method is applicable to the personal sampling of the inhalable fraction of airborne particles and to static (area) sampling. The analytical method is applicable to the determination of masses of 0,01 mg to 2,5 mg of HCl, HBr and HNO3 per sample. The range of concentrations of HCl, HBr and HNO3 in air for which the measuring procedure is applicable is determined by the sampling method selected by the user. For a 240-litre air sample, the working range is approximately 0,04 mg/m3 to 10 mg/m3 for HCl, HBr and HNO3. The procedure is intended to differentiate between the acids and their corresponding salts. If both are present in the air, particulate salts are trapped on a pre-filter. Co-sampled particulate matter trapped on the pre-filter and/or deposited on the walls of the sampler may be analysed, if desired. Acids can react with co-sampled particulate matter on the pre-filter, causing interference with the measurement of the acid concentration. |
| 국제분류(ICS)코드 | 13.040.30 : 작업장 환경 |
| 페이지수 | 29 |
| Edition | 1 |
이력정보
| No. | 표준번호 | 표준명 | 발행일 | 상태 |
|---|---|---|---|---|
| 1 | ISO 21438-2:2024상세보기 | Workplace atmospheres — Determination of inorganic acids by ion chromatography — Part 2: Volatile acids, except hydrofluoric acid (hydrochloric acid, hydrobromic acid and nitric acid) | 2024-01-26 | 표준 |
| 2 | ISO 21438-2:2009상세보기 | Workplace atmospheres — Determination of inorganic acids by ion chromatography — Part 2: Volatile acids, except hydrofluoric acid (hydrochloric acid, hydrobromic acid and nitric acid) | 2009-12-04 | 구판 |
관련상품
- ISO/DIS 21438-3 - Workplace atmospheres — Determination of inorganic acids by ion chromatography — Part 3: Hydrofluoric acid and particulate fluorides
- ISO 21438-3:2010 - Workplace atmospheres — Determination of inorganic acids by ion chromatography — Part 3: Hydrofluoric acid and particulate fluorides
- ISO 21438-1:2022 - Workplace atmospheres — Determination of inorganic acids by ion chromatography — Part 1: Non-volatile acids (sulfuric acid and phosphoric acid)
- ISO 21438-2:2024 - Workplace atmospheres — Determination of inorganic acids by ion chromatography — Part 2: Volatile acids, except hydrofluoric acid (hydrochloric acid, hydrobromic acid and nitric acid)
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