Page:NIOSH Manual of Analytical Methods - 2517.pdf/1



METHOD: 2517, Issue 2

no standard

handle with caution

no standard (1 ppm = 8.27 mg/m³ @ NTP)

liquid; d 1.671 g/mL @ 25 °C; BP 162 °C; VP 450 Pa (3.4 mm Hg; 4500 ppm) @ 20 °C

Pentalin; ethane pentachloride.

SAMPLING

SOLID SORBENT TUBE (Porapak R, 70 mg/35 mg) 0.01 to 0.2 L/min 1 L @ 0.1 mg/m³ 10 L routine stable ≥ 7 days @ 25 °C;

≥ 21 days @ 0 °C in the dark 2 to 10 field blanks per set

ACCURACY

0.014 to 5.37 mg/m³[1] (3-L samples) not significant [1] 0.075 [1] ± 15%

MEASUREMENT

GAS CHROMATOGRAPHY,$2$Ni ECD pentachloroethane 2 mL hexane; 30 min ultrasonic 240 °C 250 °C 70 °C 5 µL 5% methane, 95% argon; 30 mL/min 5% methane, 95% argon if required; 80 mL/min nickel, 2-mm ID x 2 m, packed with 3% OV-17 on 100/120 mesh Chromosorb WHP standard solutions of pentachloroethane in hexane 0.04 to 40 µg per sample 0.004 µg per sample [2] 0.019 [1]

APPLICABILITY: The working range is 0.01 to 20 mg/m³ (0.001 to 2.4 ppm) for a 5-L air sample.

INTERFERENCES: 1,2,2,3-Tetrachloropropane interferes with the analyte GC peak but is not likely to be present in most samples. Large concentrations of 1,1,2,2-tetrachloroethane may obscure the analyte GC peak.

OTHER METHODS: This revises P&CAM 335 [2]. NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94