ETHYL BROMIDE
CH3CH2Br
MW: 108.97
METHOD: 1011, Issue 2
1011
CAS: 74-96-4
RTECS: KH6475000
EVALUATION: PARTIAL
OSHA : 200 ppm NIOSH: no REL ACGIH: 5 ppm (skin); suspected carcinogen (1 ppm = 4.46 mg/m 3 @ NTP)
PROPERTIES:
Issue 1: 15 May 1985 Issue 2: 15 August 1994
liquid; d 1.461 g/mL @ 20 °C; BP 38 °C; MP -119 °C; VP 51 kPa (380 mm Hg; 50% v/v) @ 20 °C; explosive range 6.8 to 11% v/v in air
SYNONYMS: bromoethane
SAMPLING SAMPLER:
SOLID SORBENT TUBE (coconut shell charcoal, 100 mg/50 mg)
FLOW RATE:
0.01 to 0.2 L/min
VOL-MIN: -MAX:
0.5 L @ 200 ppm 4L
SAMPLE STABILITY:
not known
FIELD BLANKS:
2 to 10 field blanks per set
MEASUREMENT TECHNIQUE:
GAS CHROMATOGRAPHY, FID
ANALYTE:
ethyl bromide
DESORPTION:
1 mL 2-propanol; overnight
INJECTION VOLUME:
5 µL
TEMPERATURE-INJECTION: -DETECTOR: -COLUMN:
ACCURACY RANGE STUDIED:
550 to 2200 mg/m 3 [1] (4-L samples)
BIAS:
- 6.4%
200 °C 300 °C 60 °C
CARRIER GAS:
N 2 or He, 30 mL/min
COLUMN:
3 m x 3-mm OD stainless steel; 10% FFAP; on 80/100 mesh Chromosorb W-AW
CALIBRATION:
standard solutions of ethyl bromide in 2-propanol
RANGE:
0.4 to 10 mg per sample
ESTIMATED LOD: 0.02 mg per sample [2]
ˆ ): 0.054 [1] OVERALL PRECISION (S rT ACCURACY:
± 15.0%
PRECISION (Sr):
0.025 @ 1.8 to 8.5 mg per sample [1]
APPLICABILITY: The working range is 22 to 560 ppm (100 to 2500 mg/m 3) for a 4-L air sample. Ethyl bromide is used in organic synthesis as a solvent and as a refrigerant, anesthetic, and grain and fruit fumigant.
INTERFERENCES: None reported. An alternate GC column is 30 m x 0.32-mm fused silica capillary coated with 0.5-µm DBWAX at 50 °C isothermal [2].
OTHER METHODS: This revises Method S106 [3].
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94
