Method 68

Acetaldehyde by GC/NPD

This method describes the sample collection and analysis of acetaldehyde. Air samples are collected by drawing known volumes of air through 8mm OD sampling tubes containing XAD-2 adsorbent which has been coated with 2-(hydroxymethyl) piperidine. Each sampling tube contains a 450-mg sampling section and a 225-mg backup section. The samples are desorbed with toluene and the derivatized acetaldehyde is analyzed by gas chromatography using a nitrogen selective detector.



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Method Data

Hold Times, Preservatives, Preps, Collection, Analytical & Documentation
Holding Time:   At least 23 days.
Preservatives:   Store at room temperature or keep refrigerated.
Required Preps:   Silane-treated glass tubes packed with pretreated XAD-2 adsorbent coated with 2-HMP; 450mg/225mg 11cm x 8mmOD x 6mmID.
Collection Method:   Treated XAD-2 tubes: 3 L at 0.05 L/min.
Analytical Methodology:   GC/NPD
Documentation:   068

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.