Method 7603

Silica, Crystalline in Coal Mine Dust by IR

This method is designed to determine quartz in respirable coal mine dust samples. Samples are collected using a cyclone and preweighed filter and analyzed using infrared spectrophotometry. The working range is 0.03 to 2 mg/m³ for a 1000-L sample.

(NIOSH Issue 2: 15 August 1994)


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Method Data

Hold Times, Preservatives, Preps, Collection, Analytical & Documentation
Holding Time:   N/A
Preservatives:   N/A
Required Preps:   Tared 37 mm, 5 µm PVC filter
Collection Method:   Cyclone and preweighed filter, 300-1000 L @ 0.1 mg/m³, variable flow rates
Analytical Methodology:   Infrared Spectrophotometry
Documentation:   7603

Analyte List*

Analyte Formula CAS Number Detection Limit
Silica, crystalline

* The analytes and detection limits listed for each method represent the typical detection limits and analytes reported for that particular method. Keep in mind that analyte lists may vary from laboratory to laboratory. Detection limits may also vary from lab to lab and are dependent upon the sample size, matrix, and any interferences that may be present in the sample.