Method 1604


This method is used for the determination of acrylonitrile.  The sample is collected on a charcoal tube, desorbed in 2% (v/v) acetone in carbon disulfide, and analyzed using GC/FID (flame ionization detector).  Use of a nitrogen selective detector (NPD) increases the sensitivity and specificity of the analysis.

The working range of the method is 0.7 to 46 ppm (1.5 to 100 mg/m³) for a 10 L air sample.  NIOSH has sampled for acrylonitrile at acrylic and electric plants.

NOTE: This method revises NIOSH Methods S156 and 1604 (2/15/84).  P&CAM 202 has been dropped due to poor sensitivity (Limit of Detection = 0.1 mg per sample).

(NIOSH Issue 2: 15 August 1994)


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Method Data

Hold Times, Preservatives, Preps, Collection, Analytical & Documentation
Holding Time:   The method says at least 7 days from sampling to analysis if the samples are kept at 25°C.
Preservatives:   Store samples at 25°C.
Required Preps:   Charcoal tube, 100 mg/50 mg (SKC 226-01)
Collection Method:   The method recommends a flow rate of 0.01 - 0.2 L/min. with a collection volume of 3.5 - 20 L.
Analytical Methodology:   GC/FID
Documentation:   1604

Analyte List*

Analyte Formula CAS Number Detection Limit

* 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.