Page:NIOSH Manual of Analytical Methods - 5100.pdf/1

 CARBON BLACK C

MW: 12.01 METHOD:  5100, Issue 1

5100

CAS: 1333-86-4 EVALUATION:  FULL

OSHA:	  3.5 mg/m3[1] NIOSH:	 3.5 mg/m3 (in presence of PAHs: carcinogen/PAHs to 0.1 mg/m3, cyclohexane extractable fraction) [2] For other OELs and guidelines:	 See references [3,4]

RTECS: FF5800000 Issue 1: 30 April 2015

PROPERTIES:	 Solid; may contain polynuclear aromatic hydrocarbons (PAHs)

SYNONYMS:	 Acetylene black; amorphous carbon; furnace black; lamp black SAMPLING SAMPLER:	 INTERNAL CAPSULE, (tared 37-mm, 2- to 5-µm PVC filter melded to PVC housing) in 37-mm 2-piece cassette FLOW RATE:	 1 to 2 L/min VOL-MIN: -MAX:

75 L @ 3.5 mg/m3 1400 L @ 3.5 mg/m3

MEASUREMENT TECHNIQUE:

GRAVIMETRIC (INTERNAL CAPSULE WEIGHT)

ANALYTE:

Carbon black

BALANCE:

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

CALIBRATION:

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

RANGE:

0.25 to 5 mg per sample

ESTIMATED LOD:

0.075 mg per sample

SHIPMENT:	 Routine SAMPLE STABILITY:	 28 days minimum BLANKS:

Minimum of 2 field blanks per batch ACCURACY

RANGE STUDIED:

0.1 to 4 mg/sample

BIAS:

0.058 [5]

OVERALL PRECISION (ŜrT):

0.059 [5]

ACCURACY:

± 15.5%

PRECISION ( Sr ): 0.031 at 2 mg per sample [5]

APPLICABILITY: The working range is 1.5 to 25 mg/m3 for a 200-L air sample. This method is not applicable for the determination of “cyclohexane-solubles” [3]. The method is nonspecific; information on any other particulate materials that may be present should be assessed. INTERFERENCES: Moisture and static electricity can affect gravimetric measurements. Humidity control and minimization of static effects are addressed in this procedure. The presence of co-sampled airborne particulate material is a positive interference since this is a gravimetric method. OTHER METHODS: This method is preferred over Method 5000, Issue 2 [6], and is similar to Method 0501 for particulates not otherwise regulated [8]. OSHA method PV2121 describes a similar procedure (but for respirable sampling) using an alternative sampler design [9].

NIOSH Manual of Analytical Methods (NMAM), Fifth Edition