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| Titel: |
A personal monitor for hydrogen cyanide employing permeation sampling |
| Auteur: |
Hardy, James K. West, Philip W. |
| Verschenen in: |
Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering |
| Paginering: | Jaargang 16 (1981) nr. 2 pagina's 201-214 |
| Jaar: |
1981 |
| Inhoud: |
A method for the determination of personal exposure to hydrogen cyanide is described. Samples are collected by permeation through a silicone membrane into 10 mL 0.1N NaOH. The collected HCN (as CN-) is converted to a colored product and the resulting solution is measured spectrophoto-metrically. The HCN exposure (time-weighted-average) is then calculated. The detection limit of the method is 0.01 ppm (0.011 μg/m3 at 20°C) for an 8 h exposure with a working range of 0.1-50 ppm. The device responds in less than 1 min and is unaffected by variations in humidity. Temperature effects were observed with a maximum error of ± 5% over the normal working range (0-45°C). The only significant interferences observed were from chlorine and cyanogen (-73.7 and ±21.0% relative error respectively). The effects of the former were reduced to <-3% with the addition of ascorbic acid to the absorbing solution. A device can be constructed that is small in weight and size and can serve as either an area or personal monitor. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 1 van 11 gevonden artikelen
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