Page:NIOSH Manual of Analytical Methods - 5000.pdf/1

 CARBON BLACK

C

MW: 12.01

CAS: 1333-86-4

METHOD: 5000, Issue 2

5000

RTECS: FF5800000

EVALUATION: FULL

OSHA : 3.5 mg/m 3 NIOSH: 3.5 mg/m 3 (in presence of PAHs: carcinogen/PAHs to 0.1 mg/m 3, cyclohexane extractable fraction) ACGIH: 3.5 mg/m 3

PROPERTIES:

Issue 1: 15 May 1989 Issue 2: 15 August 1994

solid; may contain polynuclear aromatic hydrocarbons (PAH)

SYNONYMS: acetylene black; amorphous carbon; furnace black; lamp black

SAMPLING SAMPLER:

FILTER (tared 5-µm PVC membrane)

FLOW RATE:

1 to 2 L/min

VOL-MIN: -MAX:

30 L @ 3.5 mg/m 3 570 L

SHIPMENT:

routine

SAMPLE STABILITY:

indefinitely

BLANKS:

2 to 10 field blanks per set

MEASUREMENT TECHNIQUE:

GRAVIMETRIC (FILTER WEIGHT)

ANALYTE:

airborne particulate material

BALANCE:

0.001 mg sensitivity; use same balance before and after sample collection

CALIBRATION:

National Institute of Standards and Technology, Class S-1.1 weights or ASTM Class 1 weights

RANGE:

0.1 to 2 mg per sample

ESTIMATED LOD:

0.03 mg per sample

PRECISION (Sr):

0.025 @ 3.5 mg/m 3 [1, 2]

ACCURACY RANGE STUDIED:

2 to 8 mg/m 3 (100-L samples)

BIAS:

0.01%

ˆ ): 0.056 [1] OVERALL PRECISION (S rT ACCURACY:

± 11.0%

APPLICABILITY: The working range is 0.5 to 10 mg/m 3 for a 200-L air sample. This method is not applicable for the determination of "cyclohexane-solubles" [3]. This analysis is simple but the method is nonspecific. Information on any o ther particulate materials present should be assessed. The method may be extended to higher air concentrations (e.g., nuisanc e dust levels) by collecting a smaller sample volume [4].

INTERFERENCES: The presence of any other particulate material in the air being sampled will be a positive interference since this is a gravimetric method.

OTHER METHODS: This is Method S262 [5] in a revised format. It is similar, except for collecting device, to the method described in the carbon black criteria document [3].

NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94