Page:NIOSH Manual of Analytical Methods - 4000.pdf/1

 TOLUENE (diffusive sampler)

C6H5CH3

MW: 92.14

METHOD: 4000, Issue 2

CAS: 108-88-3

4000

RTECS: XS5250000

EVALUATION: FULL

OSHA : 200 ppm; C 300 ppm; P 500 ppm NIOSH: 100 ppm; STEL 150 ppm ACGIH: 50 ppm (skin) (1 ppm = 3.77 mg/m3)

PROPERTIES:

Issue 1: 15 August 1987 Issue 2: 15 August 1994 liquid; d 0.866 g/mL @ 20 C; BP 110.6 C; MP -95 C; VP 3.8 kPa (28 mmHg; 3.7% v/v) @ 25 C; explosive range 1.3 to 7.1% v/v in air

SYNONYMS: methylbenzene; phenyl methane; toluol

SAMPLING SAMPLER:

DIFFUSIVE SAMPLER (activated carbon)

SAMPLE TIME-MIN: -MAX:

SHIPMENT:

SAMPLE STABILITY:

BLANKS:

15 min @ 200 ppm 8 h @ 20 to 200 ppm

see step 2 - if necessary, transfer sorbent pad to septum-capped vial; otherwise, routine

at least 2 weeks @ 25 C if stored in septumcapped vial 2 to 10 field blanks per set

BULK SAMPLE: desirable

MEASUREMENT TECHNIQUE:

GAS CHROMATOGRAPHY, FID

ANALYTE:

toluene

DESORPTION:

1.5 mL carbon disulfide; stand 30 min

INJECTION VOLUME:

5 µL

TEMPERATURE-INJECTION: -DETECTOR: -COLUMN:

175 C 200 C 100 C

CARRIER GAS:

He or N2, 30 mL/min

COLUMN:

3.6 m x 3-mm OD, SP-1000 on 80/100 mesh Chromosorb WHP

CALIBRATION:

analyte solutions in CS2

RANGE:

0.5 to 15 mg per sample

ACCURACY RANGE STUDIED:

75 to 2250 mg/m3 [1]

BIAS:

not significant [1]

OVERALL PRECISION ( ACCURACY:

rT

):

0.038 [1]

ESTIMATED LOD: 0.01 mg per sample PRECISION ( r):

0.022 [1]

± 7.4%

APPLICABILITY: The working range is 13 to 660 ppm (50 to 2500 mg/m3) for a 4-hour sample. The method is applicable to STEL determinations. The method determines toluene vapor only (not aerosol). Competitive adsorption by water vapor and other volatile organic solvents affects sampler capacity.

INTERFERENCES: None identified. The chromatographic column or separation conditions may be changed to circumvent interference problems.

OTHER METHODS: NIOSH Methods 1500 and 1501 [2] employ active sampling on charcoal tubes with overall sensitivity about the same as this method.

NIOSH Manual of Analytical Methods (NMAM), Fourth Edition