POLYCHLOROBIPHENYLS
mixture:
C12H10-x Clx [where x = 1 to 10]
MW: ca. 258 (42% Cl ; C12H7Cl3); ca. 326 (54% Cl ; C12H5Cl5)
METHOD: 5503, Issue 2
CAS: Table 1
EVALUATION: PARTIAL
OSHA : 1 mg/m3 (42% Cl); 0.5 mg/m3 (54% Cl) NIOSH: 0.001 mg/m3/10 h (carcinogen) ACGIH: 1 mg/m3 (42% Cl) (skin) 0.5 mg/m3 (54% Cl) (skin)
5503
RTECS: Table 1
Issue 1: 15 February 1984 Revision #1: 15 August 1987 Issue 2: 15 August 1994
PROPERTIES: 42% Cl: BP 325 to 366 °C; MP -19 °C; d 1.38 g/mL @ 25 °C; VP 0.01 Pa (8 x 10-5 mm Hg; 1 mg/m3) @ 20 °C 54% Cl: BP 365 to 390 °C; MP 10 °C; d 1.54 g/mL @ 25 °C; VP 0.0004 Pa (3 x 10-6 mm Hg; 0.05 mg/m3) @ 20 °C
SYNONYMS: PCB; 1,1'-biphenyl chloro; chlorodiphenyl, 42% Cl (Aroclor 1242); and 54% Cl (Aroclor 1254)
SAMPLING SAMPLER:
FILTER + SOLID SORBENT (13-mm glass fiber + Florisil, 100 mg/50 mg)
FLOW RATE: 0.05 to 0.2 L/min or less VOL-MIN: -MAX:
1 L @ 0.5 mg/m3 50 L
SHIPMENT:
transfer filters to glass vials after sampling
SAMPLE STABILITY:
MEASUREMENT TECHNIQUE:
GAS CHROMATOGRAPHY, ECD (6 3Ni)
ANALYTE:
polychlorobiphenyls
DESORPTION:
filter + front section, 5 mL hexane; back section, 2 mL hexane
INJECTION VOLUME:
unknown for filters; 2 months for Florisil tubes [1]
4-µL with 1-µL backflush
TEMPERATURE-INJECTION: -DETECTOR: -COLUMN: CARRIER GAS:
BLANKS:
250 to 300 °C 300 to 325 °C 180 °C
N2, 40 mL/min
2 to 10 field blanks per set COLUMN:
glass, 1.8 m x 2-mm ID, 1.5% OV-17/1.95% QF-1 on 80/100 mesh Chromosorb WHP
ACCURACY RANGE STUDIED:
not studied
BIAS:
none identified
ˆ ): not evaluated OVERALL PRECISION (S rT ACCURACY:
not determined
CALIBRATION:
standard PCB mixture in hexane
RANGE:
0.4 to 4 µg per sample [2]
ESTIMATED LOD: 0.03 µg per sample [2] PRECISION (Sr):
0.044 [1]
APPLICABILITY: The working range is 0.01 to 10 mg/m3 for a 40-L air sample [1]. With modifications, surface wipe samples may be analyzed [3,4].
INTERFERENCES: Chlorinated pesticides, such as DDT and DDE, may interfere with quantification of PCB. Sulfur-containing compounds in petroleum products also interfere [5].
OTHER METHODS: This method revises methods S120 [6] and P&CAM 244 [1]. Methods S121 [7] and P&CAM 253 [8] for PCB have not been revised.
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94
