Page:NIOSH Manual of Analytical Methods - 7404.pdf/1

 CELLULOSE INSULATION MW: 00.00

(C6 H10 O5 )n

METHOD: 7404, Issue 1

7404

CAS: 9004-34-6

RTECS: FJ5691460

EVALUATION: PARTIAL

Issue 1: 15 March 2003

PROPERTIES: solid

SYNONYMS: cellulosic fiber loose fill thermal insulation. Cocoon. SAMPLING

MEASUREMENT TECHNIQUE:

MICROSCOPY, SCANNING ELECTRON (SEM)

ANALYTE:

Fibers, (manual count)

SAMPLER:

FILTER (0.45- to 1.2-um polycarbonate membrane, 25-mm; conductive cowl on cassette)

FLOW RATE:

1 L/min

VOL-MIN: -MAX:

N/A

SAMPLE PREPARATION:

SHIPMENT:

Routine (pack to reduce shock)

EQUIPMENT:

Scanning electron microscope

SAMPLE STABILITY:

CALIBRATION:

SEM performance standard

Stable RANGE:

Not determined

BLANKS:

2 or 10% field blanks per set ACCURACY

RANGE STUDIED:

Not determined

BIAS:

Not determined

OVERALL PRECISION:

Not determined

ACCURACY:

Not determined

Colloidal graphite paint/carbon disk planchet.

ESTIMATED LOD: 1 confirmed cellulose fiber above 95% of expected mean blank value PRECISION:

Not determined

APPLICABILITY: This method is useful for the quantitative determination of airborne cellulose fibers during isulation installation [1].

INTERFERENCES: Non-fibrous cellulose. Very large cellulose fibers and cellulose fibers with convoluted shapes might interfere with fibers characterization. Other fiber types are typically rare and then only in trace amounts.

OTHER METHODS: The counting rules in this method were derived from Method 7400.

NIOSH Manual of Analytical Methods (NMAM), Fourth Edition