1,2-DICHLOROTETRAFLUOROETHANE See DICHLORODIFLUOROMETHANE (METHOD 1018) for procedure CClF2CCIF2
MW: 170.92
METHOD: 1018, Issue 2
CAS: 76-14-2
RTECS: KI1101000
EVALUATION: FULL
OSHA : 1000 ppm NIOSH: 1000 ppm ACGIH: 1000 ppm (1 ppm = 6.99 mg/m 3 @ NTP)
PROPERTIES:
Issue 1: 15 August 1987 Issue 2: 15 August 1994
gas; BP 3.8 °C; MP -94 °C
SYNONYMS: cryofluorane, Refrigerant 114
SAMPLING SAMPLER:
SOLID SORBENT TUBES (two coconut shell charcoal tubes in series, 400/200 mg and 100/50 mg)
MEASUREMENT TECHNIQUE:
GAS CHROMATOGRAPHY, FID
ANALYTE:
1,2-dichlorotetrafluoroethane
FLOW RATE: 0.01 to 0.05 L/min
DESORPTION:
20 mL methylene chloride
VOL-MIN: -MAX:
1 L @ 1000 ppm 4L
INJECTION VOLUME:
1 µL
SHIPMENT:
refrigerated
SAMPLE STABILITY:
TEMPERATURE-INJECTOR: -DETECTOR: -COLUMN:
at least 7 days @ -10 °C
BLANKS:
2 to 10 field blanks per set
200 °C 260 °C 35 °C for 3 min, 15 °C/min to 75 °C, hold 6 min
CARRIER GAS:
He, 1.5 mL/min
COLUMN:
DB-1 fused silica capillary, 30 m x 0.32-mm ID, 1-µm film thickness or equivalent
CALIBRATION:
standard solutions of analyte in methylene chloride
RANGE:
5 to 40 mg per sample [1]
ACCURACY RANGE STUDIED:
1800 to 6970 mg/m 3 [3]
BIAS:
0%
ˆ ): 0.074 [3] OVERALL PRECISION (S rT
ESTIMATED LOD: 0.03 mg per sample [1]
ACCURACY:
PRECISION (Sr):
± 14.5%
0.038 @ 10-40 mg per sample [1]
APPLICABILITY: The working range is 700 to 5700 ppm 1,2-dichlorotetrafluoroethane (5000 to 40,000 mg/m 3) for a 1-L air sample. This method was first evaluated for dichlorodifluoromethane and 1,2-dichlorotetrafluoroethane with packed column gas chromatography [1].
INTERFERENCES: None identified.
OTHER METHODS: This combines and revises Methods S111 and S108 [2].
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94
