POLYCHLOROBENZENES
(1) C6H3Cl3 (2) C6H2Cl4 (3) C6HCl5
MW: (1) 181.45 (2) 215.89 (3) 250.34
METHOD: 5517, Issue 2
5517
CAS: (1) 120-82-1 (2) 95-94-3 (3) 608-93-5
RTECS:
EVALUATION: FULL
OSHA : no PEL NIOSH: (1) C 5 ppm, Group III Pesticides; (2) & (3) no REL ACGIH: (1) C 5 ppm; (2) & (3) no TLV
(1) DC2100000 (2) DB9450000 (3) DA6640000
Issue 1: 15 August 1987 Issue 2: 15 August 1994
PROPERTIES: Table 1
SYNONYMS: (1) 1,2,4-trichlorobenzene (2) 1,2,4,5-tetrachlorobenzene (3) pentachlorobenzene SAMPLING SAMPLER:
FILTER + SOLID SORBENT TUBE (PTFE filter + XAD-2, 100 mg/50 mg)
FLOW RATE:
0.01 to 0.2 L/min
VOL-MIN: -MAX:
3L 12 L
SHIPMENT:
separate filter and sorbent tube
SAMPLE STABILITY:
at least 13 days @ 25 °C [1]
FIELD BLANKS:
2 to 10 field blanks per set
MEASUREMENT 63
TECHNIQUE:
GAS CHROMATOGRAPHY,
ANALYTE:
compounds above
DESORPTION:
2 mL hexane; 30 min ultrasonic agitation
INJECTION VOLUME:
2 µL
TEMPERATURE-INJECTION: -DETECTOR: -COLUMN:
Ni ECD
220 °C 300 °C 160 °C
GASES-CARRIER: -PURGE:
nitrogen, 30 mL/min nitrogen, 90 mL/min
COLUMN:
2.0 m x 2-mm ID nickel, 10% Carbowax 20M-TPA on 80/100-mesh Chromosorb WAW
CALIBRATION:
standard solutions of analytes in hexane
ˆ ): Table 2 OVERALL PRECISION (S rT
RANGE:
0.02 to 500 µg per sample [1]
ACCURACY:
ESTIMATED LOD:
0.001 µg/mL in hexane [1]
PRECISION (Sr):
Table 2
ACCURACY RANGE STUDIED:
Table 2
BIAS:
Table 2
Table 2
APPLICABILITY: The working range is 0.002 to greater than 30 mg/m 3 for each analyte for a 10-L air sample. Linear range of the detector is limited but samples are diluted prior to measurement.
INTERFERENCES: Using chromatographic conditions given above, 1,2,3,5-tetrachlorobenzene coelutes with 1,2,4,5-tetrachlorobenzene.
OTHER METHODS: This revises P&CAM 343 [2].
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94
