Abstract
Motor-powered syringes used as personal samplers have been tested for determination of solvents in air. The plunger of the all-glass syringe (30 mL) is drawn out at constant speed during the sampling. The syringe now contains 30 mL air with a concentration of solvents corresponding to the mean concentration in the air during the sampling period. Normally 1 mL of the sample is injected in a gas chromatograph for qualitative and quantitative analysis. Aluminum laminate bags (5–10 L) with known volumes of air and known quantities of solvents were used to calibrate the gas chromatograph. The samplers were tested for losses for acetone, n-butanol, toluene and styrene. The reliability and accuracy of the method have been tested on air with known concentrations, produced in an apparatus constructed to give constant concentrations. The percentage yield is given after storage of the sample from 5 min to 17 hr for toluene (200–260 mg/m3), styrene (260 mg/m3), acetone (380 mg/m3) and n-butanol (240 mg/m3) for uncond...
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