HYDROCARBONS, AROMATIC
FORMULA: Table 1
MW: Table 1
METHOD: 1501, Issue 3
CAS: Table 1
EVALUATION: Full
Group A:
benzene
toluene
Group B:
cumene
p-tert-butyltoluene
ethylbenzene
Table 1
o-xylene
"-methylstyrene
SAMPLING SAMPLER:
SOLID SORBENT TUBE (coconut shell charcoal, 100 mg/50 mg)
FLOW RATE:
Table 3
VOL-MIN: -MAX:
Table 3 Table 3
SHIPMENT:
Routine
SAMPLE STABILITY:
30 days @ 5°C
BLANKS:
10% of samples
RTECS: Table 1 Issue 1: 15 August 1990 Issue 3: 15 March 2003
PROPERTIES:
OSHA : Table 2 NIOSH: Table 2 ACGIH: Table 2 SYNONYMS: (Synonyms in Table 1)
1501
m-xylene $-methylstyrene
p-xylene styrene
MEASUREMENT TECHNIQUE:
GAS CHROMATOGRAPHY, FID
ANALYTE:
Hydrocarbons listed above
DESORPTION:
1 mL CS2 , stand 30 min with agitation
INJECTION VOLUME:
TEMPERATURE -INJECTION: -DETECTOR: -COLUMN:
1 µL (Group A: split 5:1; Group B: split 1:1)
250 °C 300 °C Group A: 40 °C (10 min) to 230°C (10 °C/min) Group B: 35°C (8 min) to 225°C (10°C/min)
CARRIER GAS:
He @ 2.6 mL/min
COLUMN:
Capillary, fused silica Group A: 30m x 0.32-mm ID; 1-µm film 100% PEG or equivalent Group B: 30m x 0.53-mm ID; 3-µm film crossbonded® 35% diphenyl 65% dimethyl polysiloxane or equivalent
CALIBRATION:
Solutions of analytes in CS 2
RANGE:
Table 4
ACCURACY RANGE STUDIED:
Table 3
BIAS:
Table 3
OVERALL PRECISION (Ö r T ):
Table 3
ACCURACY:
Table 3
ESTIMATED LOD: Table 4 PRECISION ( þ r ):
Table 4
APPLICABILITY: This method is for peak, ceiling, and TWA determinations of aromatic hydrocarbons. Interactions between analytes may reduce breakthrough volumes and affect desorption efficiencies. Naphthalene, originally validated in S292 [4], failed to meet acceptable desorption efficiency recovery and storage stability criteria at the levels evaluated in this study. However, the application of this method to naphthalene levels at or near the REL/PEL continues to meet acceptable recovery criteria. Styrene failed to meet acceptable recovery criteria at the two lowest levels evaluated in this study (highest level to meet the criteria was 181 µg/sample). INTERFERENCES: Under conditions of high humidity, the breakthrough volumes may be reduced. Other volatile organic compounds such as alcohols, ketones, ethers, and halogenated hydrocarbons are potential analytical interferences. OTHER METHODS: This method updates NMAM 1501 issued on August 15, 1994 [1] which was based upon P&CAM 127 (benzene, styrene, toluene, and xylene) [2]; S22 (p-tert-butyltoluene) [3]; S23 (cumene) [3]; S29 (ethylbenzene) [3] ; S26 ("-methylstyrene) [3]; S30 (styrene); S311 (benzene) [4]; S343 (toluene) [4]; and S318 (xylenes) [4].
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition
