Page:NIOSH Manual of Analytical Methods - 1020.pdf/1

 	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