Page:NIOSH Manual of Analytical Methods - 2013.pdf/1

 PHENYL ETHER-DIPHENYL MIXTURE

(C6H5)2O & C6H5C6H5

MW: 166 (average)

METHOD: 2013, Issue 1

CAS: 8004-13-5

EVALUATION: PARTIAL

OSHA : 1 ppm NIOSH: 1 ppm ACGIH: no TLV (1 ppm = 6.79 mg/m 3 @ NTP)

PROPERTIES:

2013

RTECS: DV1500000 Issue 1: 15 August 1994

liquid; BP 257 °C; MP 12 °C; d = 1.06 g/mL @ 25°C; VP = 10 Pa (0.08 mm Hg) @ 25 °C; vapor density (air = 1) 5.7.; flammable limits in air 0.5 to 6.2% v/v

SYNONYMS: None. This is a liquid eutectic, prepared by dissolving 26.5 parts by weight solid diphenyl in 73.5 parts melted phenyl ether. SAMPLING

MEASUREMENT

SAMPLER:

SORBENT TUBE (silica gel, 150/75 mg)

FLOW RATE:

0.01 to 0.2 L/min

VOL-MIN: -MAX:

1 L @ 1 ppm 40 L

SHIPMENT:

routine

SAMPLE STABILITY:

not determined

BLANKS:

2 to 10 field blanks per set

BULK SAMPLE:

required

TECHNIQUE:

gas chromatography, FID

ANALYTE:

phenyl ether-diphenyl mixture

EXTRACTION:

0.5 mL benzene for 30 min

INJECTION VOLUME:

5 µL

CARRIER GAS:

nitrogen, 50 mL/min

COLUMN:

10-ft x 1/8-in stainless steel column packed with 5% OV-17 on 80/100 mesh, acid washed DMCS Chromosorb W

DETECTOR:

flame ionization detector

CALIBRATION:

standard solutions of eutectic mixture in hexane

RANGE:

7 to 210 µg per sample [1]

ACCURACY RANGE STUDIED:

3.86 to 15.7 mg/m 3 [1] (10-L samples)

BIAS:

- 0.35%

ESTIMATED LOD: 4 µg per sample [1]

ˆ ): OVERALL PRECISION (S rT

PRECISION (Sr):

0.073 @ 38 to 156.7 µg per sample [1]

0.089 [1]

ACCURACY:

± 17.2%

APPLICABILITY: The working range is 0.1 to 10 ppm (0.7 to 70 mg/m 3) for a 10-L air sample. Better sensitivity may be achieved with a capillary column in place of a packed column; a DB-17 column (50% methyl, phenyl-50% dimethyl-polysiloxane) with appropriate instrumental conditions is recommended.

INTERFERENCES: None identified.

OTHER METHODS: This is Method S73 [2] in fourth edition format.

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