Method 1550

Naphthas by GC/FID

This is for the determination of various types of hydrocarbon mixtures called naphthas which are used in paints and varnishes and as general purpose solvents. The sample is collected on a charcoal tube, desorbed with carbon disulfide, and analyzed by GC/FID (flame ionization detector).  Most naphthas are complex and the components elute over a wide temperature range making interferences from other substances possible.

The working range is 100 to 2000 mg/m³ for a 5 L air sample. 

NOTE: This method combines and replaces Methods S86, S380, and S382.

(NIOSH Issue 2: 15 August 1994)


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Method Data

Hold Times, Preservatives, Preps, Collection, Analytical & Documentation
Holding Time:   The method states at least 1 week from sampling to analysis if kept at 25°C.
Preservatives:   Store 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. and a collection volume of 1.3 - 20L.
Analytical Methodology:   GC/FID
Documentation:   1550

Analyte List*

Analyte Formula CAS Number Detection Limit
Petroleum distillates (naphtha)
Naphtha (coal tar)
VM & P Naphtha
Stoddard solvent

* 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.