| Document ID (ISN) | 59731 |
| CIS number |
93-589 |
| ISSN - Serial title |
0002-8894 - American Industrial Hygiene Association Journal |
| Year |
1991 |
| Convention or series no. |
|
| Author(s) |
Cohen H.J., Levine S.P., Garrison R.P. |
| Title |
Development of a field method for determining the service lives of respirator cartridges - Part IV. Results of field validation trials |
| Bibliographic information |
July 1991, Vol.52, No.7, p.263-270. Illus. 24 ref. |
| Abstract |
Results of a fourth study on the use of small, carbon-filled glass tubes (respirator carbon tubes - RCTs), for predicting the service lives of organic vapour respirator cartridges are presented. Organic vapours are drawn through the RCT by using a personal sampling pump until breakthrough is detected. This breakthrough time is then used in conjunction with a bed-resident adsorption model to predict the breakthrough time of a cartridge containing carbon identical to that in the RCT. In a workplace environment the RCT method was applied to the prediction of breakthrough times of known concentrations of carbon tetrachloride and pyridine. The method predicted cartridge breakthrough times to an accuracy of ±8% at the 95% confidence level, which equalled or exceeded results of previously reported laboratory studies. Actual breakthrough times averaged within ±5% of those predicted with previous laboratory data. A plot of bed-residence time versus breakthrough time yielded a coefficient of determination of 0.71 when ambient concentrations were standardised. |
| Descriptors (primary) |
gas removing respirators; air purifying respirators; activated carbon; prediction; sorbent filters; field tests; service life; respirators |
| Descriptors (secondary) |
carbon tetrachloride; prediction formulae; statistical evaluation; pyridine |
| Document type |
D - Periodical articles |
| Country / State or Province | USA |
| Subject(s) |
Personal protection
|
| Broad subject area(s) |
Chemical safety
|
| Browse category(ies) |
Respiratory protection
|
