Page:NIOSH Manual of Analytical Methods - 2003.pdf/1

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Br₂CHCHBr₂ MW: 345.70 CAS: 79-27-6 RTECS: KI8225000

2003

METHOD: 2003, Issue 2

EVALUATION: PARTIAL

Issue 1: 15 May 1985
Issue 2: 15 August 1994

OSHA:

1 ppm

NIOSH:

no REL

ACGIH:

1 ppm
(1 ppm = 14.14 mg/m 3 @ NTP)

PROPERTIES:

liquid; d 2.964 g/mL @ 20 °C;
BP 243.5 °C; MP 0 °C; VP 13 Pa
(0.1 mm Hg) @ 20 °C

SYNONYMS:

acetylene tetrabromide; Muthmann's liquid; sym-tetrabromoethane

SAMPLING

SAMPLER:

SOLID SORBENT TUBE
(silica gel, 150 mg/75 mg)

FLOW RATE:

0.2 to 1 L/min

VOL-MIN:

50 L @ 1 ppm

SHIPMENT:

routine

SAMPLE STABILITY:

not determined

FIELD BLANKS:

2 to 10 field blanks per set

ACCURACY

RANGE STUDIED:

6.5 to 23 mg/m 3 [1] (98-L samples

BIAS:

- 9.2%

OVERALL PRECISION (SrT):

0.096 [1]

ACCURACY:

± 23.6%

Measurment

METHOD:

GAS CHROMATOGRAPHY, FID

ANALYTE:

1,1,2,2-tetrabromoethane

DESORPTION:

1 mL tetrahydrofuran; 30 min

TEMPERATURE-INJECTION:

220 °C

CARRIER GAS:

N2, 50 mL/min

COLUMN:

0.9 m x 6.4-mm OD glass; 5% SE-30 on
80/100 mesh Gas Chrom W

CALIBRATION:

1,1,2,2-tetrabromoethane in tetrahydrofuran

RANGE:

0.7 to 4 mg per sample

ESTIMATED LOD:

0.08 mg per sample

PRECISION (Sr):

0.041 [1]

APPLICABILITY:

The working range is 0.5 to 2.8 ppm (7 to 40 mg/m 3) for a 100-L air sample. High humidity during sampling will reduce breakthrough volume.

INTERFERENCES:

None identified.

OTHER METHODS:

This is Method S117 [2] in a revised format.