POLYCYCLIC AROMATIC COMPOUNDS, TOTAL (PACs)
MW: Variable METHOD: 5800, Issue 1
CAS: None
RTECS: None
EVALUATION: PARTIAL
OSHA : no PEL NIOSH: no REL ACGIH: no TLV
5800
PROPERTIES:
Issue 1: 15 January 1998
PACs are multi-numbered benzenoid-ring compounds. PACs contain polycyclic aromatic hydrocarbons (PAHs), substituted PAHs, and PAH heterocyclic derivatives.
NAMES & SYNONYMS: Total PACs as a class.
SAMPLING SAMPLER: FILTER + SOLID SORBENT (2-µm, 37-mm, PTFE filter + washed XAD-2 resin, 100/50 mg )
MEASUREMENT TECHNIQUE:
FLOW INJECTION, FLUORESCENCE DETECTOR
ANALYTE:
Polycyclic aromatic compounds as a chemical class 4 mL hexane, rotated for at least 12 hours.
FLOW RATE:
1 to 2 L/min
VOL-MIN: -MAX:
5 L @ 0.01 mg/m3 1000 L
EXTRACTION:
SHIPMENT:
Ship at @ 0 C
INJECTION VOLUME:
25 µL
SAMPLE STABILITY:
at least 30 days @ 5 C [1]
MOBILE PHASE:
100% acetonitrile at 1.5 mL/min.
BLANKS:
2 to 10 field blanks per set
CALIBRATION:
standard solutions of PACs based on Supelco QTM test mixture.
DETECTOR 1: ACCURACY RANGE STUDIED:
not studied
BIAS:
not determined
OVERALL PRECISION ( ACCURACY:
rT
):
not determined not determined
fluorescence excitation 254 nm; emission 370 nm RANGE: 0.04 to 250 µg/sample ESTIMATED LOD: 0.012 µg/sample PRECISION ( r): 0.042 @ 0.13 to 17 µg/sample [1]
DETECTOR 2:
fluorescence excitation 254 nm; emission 400 nm RANGE: 0.15 to 250 µg/sample ESTIMATED LOD: 0.05 µg/sample PRECISION ( r): 0.065 @ 0.13 to 17 µg/sample [1]
APPLICABILITY: This method is applicable for comparison of environments using the same fume source. The speciation of the PACs as a chemical class is accomplished by solid phase extraction followed by liquid-liquid extraction.
INTERFERENCES: All compounds producing detectable fluorescence at the chosen wavelengths and contained in the DMSO fraction after the sample preparation are identified as PACs.
OTHER METHODS: None identified for PACs as a class. Related methods are 2550, Benzothiazole in Asphalt Fume, by GC/sulfur chemiluminescence [2], and a gravimetric method 5042, Benzene Solubles and Total Particulate (Asphalt Fume) [3].
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition
