VINYLIDENE CHLORIDE
CH2=CCl2
MW: 96.94
METHOD: 1015, Issue 2
CAS: 75-35-4
1015
RTECS: KV9275000
EVALUATION: FULL
OSHA : no PEL NIOSH: lowest feasible; carcinogen ACGIH: 5 ppm; STEL 20 ppm; carcinogen (1 ppm = 3.96 mg/m 3 @ NTP)
PROPERTIES:
Issue 1: 15 August 1987 Issue 2: 15 August 1994
liquid; d 1.213 g/mL @ 20 °C; BP 31.7 °C; MP -122.5 °C; flammable
SYNONYMS: 1,1-dichloroethene; 1,1-dichloroethylene.
SAMPLING SAMPLER:
SOLID SORBENT TUBE (coconut shell charcoal, 100 mg/50 mg)
FLOW RATE:
0.01 to 0.2 L/min
VOL-MIN: -MAX:
2.5 L @ 1 ppm 7L
SHIPMENT:
routine
SAMPLE STABILITY:
BLANKS:
7 days @ 25 °C 21 days @ 5 °C [2]
MEASUREMENT TECHNIQUE:
GAS CHROMATOGRAPHY, FID
ANALYTE:
vinylidene chloride
DESORPTION:
1 mL CS 2; stand 30 min
INJECTION VOLUME:
5 µL
TEMPERATURE-INJECTION: -DETECTOR: -COLUMN:
150 °C 200 °C 65 °C
CARRIER GAS:
He or N 2, 30 mL/min
COLUMN:
silanized glass, 3 m x 6-mm OD packed with Durapak OPN 100/120 mesh or equivalent
CALIBRATION:
standard solutions of vinylidene chloride in CS 2
RANGE:
10 to 100 µg per sample
2 to 10 field blanks per set
ACCURACY RANGE STUDIED:
7.6 to 10 mg/m 3 [2]
BIAS:
- 0.05
ˆ ): 0.069 OVERALL PRECISION (S rT
ESTIMATED LOD: 7 µg per sample [2]
ACCURACY:
PRECISION (Sr):
± 18.6%
0.048 @ 12 to 85 µg per sample [2]
APPLICABILITY: The working range is 0.5 to 5 ppm (2 to 20 mg/m 3) for a 5-L air sample. The capacity of charcoal for vinylidene chloride decreased rapidly with increasing relative humidity and was also found to be a function of concentration.
INTERFERENCES: The GC column will not separate vinyl chloride and carbon disulfide. Other GC packings that separate vinyl chloride and CS 2 may not separate vinylidene chloride and CS 2. If determination of both of these monomers is to be performed, a capillary column such as a 105 meter Rtx® 502.2 would be required.
OTHER METHODS: The revises P&CAM 266 [1].
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94
