1,1,2-TRICHLORO-1,2,2-TRIFLUOROETHANE 1020 CCl2F–CClF2 MW: 187.38 CAS: 76-13-1 RTECS: KJ4000000 METHOD: 1020, Issue 2
EVALUATION: PARTIAL
OSHA: 1000 ppm; STEL 1250 ppm NIOSH: 1000 ppm; STEL 1250 ppm ACGIH: 1000 ppm; STEL 1250 ppm
(1 ppm = 7.66 mg/m³ @ NTP)
Issue 1: 15 August 1987 Issue 2: 15 August 1994
PROPERTIES: clear liquid; d = 1.55 g/mL @ 20 °C; BP = 47.6 °C; MP −35 °C; vapor pressure= 38 kPa (384 mm Hg, 51% v/v) @ 20 °C
SYNONYMS: Freon 113, Refrigerant 113, Freon TF SAMPLING SAMPLER: SOLID SORBENT TUBE (coconut shell charcoal, 100 mg/50 mg)
MEASUREMENT TECHNIQUE:
GAS CHROMATOGRAPH, FID
ANALYTE:
1,1,2-trichloro-1,2,2-trifluoroethane
DESORPTION:
1 mL CS2; stand 30 minutes
INJECTION VOLUME:
1 µL
FLOW RATE: 0.01 to 0.05 L/min VOL-MIN: -MAX:
0.1 L @ 1000 ppm 3L
SHIPMENT: refrigerated SAMPLE STABILITY: undetermined
TEMPERATURE-INJECTION: 250 °C -DETECTOR: 300 °C -COLUMN: 32 °C to 90 °C @ 5 °C/min
BLANKS:
CARRIER GAS:
He; 1 to 2 mL/min
COLUMN:
DB-Wax/Stabilwax fused silica capillary, 30 m × 0.32-mm ID, split injection 5:1; (<500 µg, splitless)
CALIBRATION:
standard solutions of analyte in CS2
RANGE:
0.015 to 14 mg per sample [2]
2 to 10 field blanks per set ACCURACY
RANGE STUDIED:
3300 to 14200 mg/m³ [1] (1.5-L samples)
BIAS:
−2.3%
OVERALL PRECISION ( ): 0.07 [1]
ESTIMATED LOD: 0.005 mg per sample [2] ACCURACY:
±14.1%
PRECISION ( ):
0.02 [2]
APPLICABILITY: The working range is 10 to 18000 mg/m³ (1.3 to 2350 ppm) for a 1.5-L air sample. This method may be used with diffusive sampler collection, but a larger volume of CS2 may be needed for desorption. INTERFERENCES: None studied. OTHER METHODS: This is a revision of NIOSH 3rd ed. Method 1020 (8/15/90). This method was updated for sequences 6937, 6956, and 6916A [1]. Method S129 [3] was originally evaluated under NIOSH Contract CDC-99-74-45.
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition
