ETHYLENE DIBROMIDE
BrH2CCH2Br
MW: 187.88
METHOD: 1008, Issue 2
1008
CAS: 106-93-4
RTECS: KH9275000
EVALUATION: PARTIAL
OSHA : 20 ppm; C 30 ppm; PEAK 50 ppm/5 min NIOSH: 0.045 ppm; C 0.13 ppm/15 min; Group I Pesticide ACGIH: carcinogen (skin) (1 ppm = 7.68 mg/m 3 @ NTP)
Issue 1: 15 February 1984 Issue 2: 15 August 1994
PROPERTIES: liquid; d 2.169 g/mL @ 25 °C; BP 131 °C; MP 10 °C; VP 1.5 kPa (11 mm Hg; 1.4% v/v) @ 25 °C
SYNONYMS: EDB, 1,2-dibromoethane
SAMPLING SAMPLER:
SOLID SORBENT TUBE (coconut shell charcoal, 100 mg/50 mg)
FLOW RATE:
0.02 to 0.2 L/min
VOL-MIN: -MAX:
0.1 L @ 0.1 ppm 25 L
SHIPMENT:
insulated container, dry ice
MEASUREMENT 63
TECHNIQUE:
GAS CHROMATOGRAPHY,
ANALYTE:
ethylene dibromide
DESORPTION:
10 mL 99:1 benzene:methanol (v/v); stand 1h
INJECTION VOLUME:
5 µL 175 °C 315 °C 50 °C
Ni ECD
SAMPLE STABILITY:
2 weeks at -25 °C or below [1,2].
TEMPERATURE-INJECTION: -DETECTOR: -COLUMN:
FIELD BLANKS:
2 to 10 field blanks per set
CARRIER GAS:
N 2, 35 mL/min
COLUMN:
1.8 m x 4-mm ID, borosilicate glass packed with 3% OV-210 on 80/100 Gas Chrom Q
CALIBRATION:
ethylene dibromide in 99:1 benzene:methanol (v/v) with internal standard
RANGE:
0.1 to 0.5 µg per sample [1]
ACCURACY RANGE STUDIED: BIAS:
see EVALUATION OF METHOD [1] not significant
ˆ ): not determined OVERALL PRECISION (S rT ACCURACY:
not determined
ESTIMATED LOD: 0.01 µg per sample [1,2] PRECISION (Sr):
0.044 [3]
APPLICABILITY: The working range is 0.0003 to 1 ppm (0.002 to 8 mg/m 3) for a 25-L air sample. The range of an ECD most useful for quantitation depends on the type of detector and chromatograph used. For reliable quantitation, the ECD must be optimized for the smallest possible amount of analyte.
INTERFERENCES: None identified. The chromatographic column or separation conditions may be changed to circumvent interference problems. An alternate chromatographic column packing is GP 20% SP-2100/0.1% Carbowax 1500 on 100/120 Chromosorb WHP [2].
OTHER METHODS: This revises P&CAM 260 [1] and Method 1008 (dated 2/15/84). Method S104 [4], which has not been revised, can also be used but uses the less sensitive flame ionization detector.
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94
