Page:NIOSH Manual of Analytical Methods - 0500.pdf/1

 Rh DEFINITION: total aerosol mass

METHOD: 0500, Issue 2

OSHA: 15 mg/m³ NIOSH: no REL ACGIH: 10 mg/m³, total dust less than 1% quartz PROPERTIES: contains no asbestos and quartz less than 1%

SYNONYMS: nuisance dusts; particulates not otherwise classified

SAMPLING

SAMPLER:	FILTER (tared 37-mm, 5-µm PVC filter)

FLOW RATE: 1 to 2 L/min

VOL-MIN: 7 L @ 15 mg/m³

-MAX:	133 L @ 15 mg/m³

SHIPMENT:	routine

SAMPLE STABILITY: indefinitely

BLANKS:	2 to 10 field blanks per set

BULK SAMPLE:	none required

ACCURACY

RANGE STUDIED:	8 to 28 mg/m³

BIAS:	0.01%

OVERALL PRECISION :	 0.056 [1]

ACCURACY:	±11.04%

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 ($\overline{S1}$):0.026 [2]

APPLICABILITY: The working range is 1 to 20 mg/m³ for a 100-L air sample. This method is nonspecific and determines the total dust concentration to which a worker is exposed. It may be applied, e.g., to gravimetric determination of fibrous glass [3] in addition to the other ACGIH particulates not otherwise regulated [4].

INTERFERENCES: Organic and volatile particulate matter may be removed by dry ashing [3].

OTHER METHODS: This method is similar to the criteria document method for fibrous glass [3] and Method 5000 for carbon black. This method replaces Method S349 [5]. Impingers and direct-reading instruments may be used to collect total dust samples, but these have limitations for personal sampling. NIOSH Manual of Analytical Methods (NMAM), Fourth Edition