Page:NIOSH Manual of Analytical Methods - 5023.pdf/1

 COAL TAR PITCH VOLATILES

various organic-soluble compounds METHOD: 5023, Issue 2

MW: various

CAS: 65996-93-2

EVALUATION: PARTIAL

OSHA : 0.2 mg/m 3 (benzene-solubles) NIOSH: 0.1 mg/m 3; carcinogen; (cyclohexane-solubles) ACGIH: 0.2 mg/m 3 (benzene solubles)

5023

RTECS: GF8655000 Issue 1: 15 May 1985 Issue 2: 15 August 1993

PROPERTIES: liquid; d 1.06 g/mL @ 38 C; 60 to 85% distills @ ≤ 355 C; creosote distills @ 270 to 395 °C

SYNONYMS: benzene-solubles, cyclohexane-solubles, coal tar pitch volatiles, creosote from coal tar.

SAMPLING SAMPLER:

FILTER (2-µm, 37-mm PTFE membrane)

MEASUREMENT TECHNIQUE: ANALYTE:

FLOW RATE: 1 to 4 L/min VOL-MIN: -MAX:

500 L @ 0.2 mg/m 3 2400 L

SHIPMENT:

routine

SAMPLE STABILITY:

unknown

BLANKS:

2 to 10 field blanks per set

GRAVIMETRIC organic-solubles (includes anthracene, benzanthracene, benzo(a)pyrene, carbazole, chrysene, phenanthrene, pyrene and others [1,2,3,4])

EXTRACTION:

benzene, cyclohexane or other appropriate solvent; ultrasonic 20 min

CALIBRATION:

NIST Class M weights

RANGE:

0.1 to 2 mg per sample

ESTIMATED LOD: 0.05 mg per sample [5] PRECISION (Sr):0.02 at 1.35 mg [5]; 0.23 for blanks [5] ACCURACY RANGE STUDIED: not studied BIAS:

unknown

OVERALL PRECISION (SrT): not determined ACCURACY:

unknown

APPLICABILITY: The working range is 0.1 to 2 mg/m 3 for a 1000-L air sample. The method is useful for air monitoring of coke oven emissions, petroleum combustion products such as diesel emissions, and petroleum asphalt fumes. The method may be applied to bulk samples. The method is non-specific and measures all substances in the sample which are soluble in the s olvent selected and which can be desorbed from particulate matter present on the filter.

INTERFERENCES: Changes in temperature or humidity during pre- and post-collection weighing affect accuracy. Losses may occur due to volatilization of collected aerosol during or after sampling.

OTHER METHODS: This method modifies and combines P&CAM 217 [6] and the criteria document method [2].

NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/93