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
