Page:NIOSH Manual of Analytical Methods - 1017.pdf/1

 TRIFLUOROBROMOMETHANE

CBrF3

MW: 148.92

METHOD: 1017, Issue 2 1987

CAS: 75-63-8

1017

RTECS: PA5425000

EVALUATION: PARTIAL

OSHA : 1000 ppm NIOSH: 1000 ppm ACGIH: 1000 ppm (1 ppm = 6.09 mg/m 3 @ NTP)

Issue 1: 15 August

PROPERTIES:

gas; vapor density 5 (air = 1); BP -57.8 °C; MP -168 °C; nonflammable

SYNONYMS: Refrigerant 13B1; bromotrifluoromethane.

SAMPLING SAMPLER:

SOLID SORBENT TUBES (two coconut shell charcoal tubes in series, 400 mg/200 mg and 100 mg/50 mg)

FLOW RATE:

0.01 to 0.05 L/min

VOL-MIN: -MAX:

0.1 L @ 1000 ppm 1L

SHIPMENT:

separate front and back tubes; in dry ice

SAMPLE STABILITY: BLANKS:

MEASUREMENT

BIAS:

trifluorobromomethane

DESORPTION:

5 mL methylene chloride; stand 30 min 5 µL

CARRIER GAS:

2 to 10 field blanks per set

- 2.9%

ANALYTE:

TEMPERATURE-INJECTOR: -COLUMN: -DETECTOR:

not determined

2890 to 11,500 mg/m (1-L samples)

GAS CHROMATOGRAPHY, FID

INJECTION VOLUME:

COLUMN:

ACCURACY RANGE STUDIED:

TECHNIQUE:

3

170 °C 105 °C 230 °C

N 2, 50 mL/min

stainless steel, 1.2 x 6-mm OD, packed with 50/80 mesh Porapak Q

CALIBRATION:

standard solutions of analyte in methylene chloride

RANGE:

0.5 to 18 mg per sample [1]

[1]

ESTIMATED LOD: 0.05 mg per sample

ˆ rT): 0.065 [1] OVERALL PRECISION (S ACCURACY:

± 13.46%

PRECISION (Sr):

0.038 @ 3 to 12 mg per sample [1]

APPLICABILITY: The working range is 80 to 3000 ppm (500 to 18,000 mg/m 3 ) for a 1-L air sample.

INTERFERENCES: None reported.

OTHER METHODS: This revises Method S125 [2].

NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94