National Institute for Occupational Safety and Health

“ Analytical Methods Evaluation and Validation for 1,2,4-Trichlorobenzene, 1,2,4,5-Tetrachlorobenzene, Pentachlorobenzene, and Polychlorinated Terphenyls: Research Report for Polychlorinated Terphenyls, NIOSH Contract No. 210-79-0102, Southern Research Institute, Birmingham, AL, available from NTIS (1982) as PB-83-140-087. [2] Kimbrough, R. D., ed. "Halogenated Biphenyls, Terphenyls, Naphthalenes, Dibenzodioxins and Related Products," Topics in Environmental Health, V. 4, Elsevier/North-Holland Biomedical Press, Amsterdam, 20-21 (1980) . ”

“ Hexane (flash point = -22 °C) and isooctane (flash point = 4 °C) are highly flammable. Prepare samples and standards in well-ventilated hood. Chlorinated terphenyls may be similar to chlorinated biphenyls in toxicity. Use protective clothing to avoid skin contact.
SAMPLING: 1. 2.
Calibrate each personal sampling pump with a representative sampler in line. Sample at an accurately known flow rate between 1 and 3 L/min for a total sample size of 100 to 1500 L.
SAMPLE PREPARATION: 3. 4. 5. ”

“ Agitate vial in ultrasonic bath for 30 min to complete extraction.
CALIBRATION AND QUALITY CONTROL: 6.
7.
Calibrate daily with at least six working standards over the range 1 to 100 μg chlorinated terphenyl per sample. a. Add known amounts of calibration stock solution to hexane in 10-mL volumetric flasks and dilute to the mark. b. Analyze together with samples and blanks (steps 9 and 10) . c. Prepare calibration graph (detector response vs. μg chlorinated terphenyl per sample) . Prepare two control samples at each of two levels for checking analysis of field samples. a. ”