XXXX absorption and excretion in industry.

@entity1 @entity4447 @entity3494
1. A study of 24 smelter workers routinely exposed to @entity4447 was conducted to evaluate some characteristics of its absorption and excretion. A statistically significant correlation was found between airborne @entity4447 concentrations below 300 mug/m3 and urinary @entity3494 values below 500 mug/liter. These @entity1 wore personal monitors for five consecutive work days and were determined to have been exposed to average airborne @entity3494 concentrations of 53 mug/m3 (70 mug/m3 of @entity4447 ) which increased their urinary @entity3494 values from 152 mug/liter to 200 mug/liter (an average gain on 32%). 2. The background average urinary @entity3494 value for adult males not exposed to @entity4447 in industry was determined to be 52.6 mug/liter for 204 @entity1 during preemployment examinations. 3. After removal from industrial @entity4447 exposure, the rate of fall in urinary @entity3494 values varies with the magnitude of the urinary @entity3494 level. An initial decrease of 9.5% per day was measured for workers having urinary @entity3494 values below 200 mug/liter. The initial decrease is about 21% per day for workers with urinary @entity3494 values over 600 mug/liter. 4. It was determined that @entity3494 in seafood can alter, in a dramatic fashion, the urinary @entity3494 values determined for smelter workers within 24 hours following consumption. It is recommended, therefore, that the absorption of @entity4447 due to industrial exposure is best evaluated from urine samples collected at least two days after seafood has been eaten.
