Method 5523

Glycols


This method is for the determination of glycols.  The sample is collected on an XAD-7 OVS tube.  After sample collection, the tube is desorbed with methanol and analyzed by GC/FID (flame ionization detector).

Hexylene glycol can be determined by this method, however, no sampling or analytical evaluation has been conducted.

NOTE: This method replaces NMAM 5500 which was found deficient in the collection of ethylene glycol in aerosol form and ethylene glycol was not separated from propylene glycol by the chromatography.


(NIOSH Issue 1: 15 May 1996)

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Method Data

Hold Times, Preservatives, Preps, Collection, Analytical & Documentation
Holding Time:   The method states the samples are stable for 28 days if kept at 5°C. Ethylene glycol is stable for 14 days if kept at 5°C.
Preservatives:   Keep the samples at 5°C.
Required Preps:   XAD-7 OVS tube, 200mg/100mg (ORBO 34)
Collection Method:   The method recommends a flow rate of 0.5 - 2 L/min. with a collection volume of 5 - 60L.
Analytical Methodology:   GC/FID
Documentation:   5523

Analyte List*

Analyte Formula CAS Number Detection Limit
Ethylene Glycol
C2H6O2
107-21-1
7
 µg
1,3-Butanediol
C4H10O2
107-88-0
616
 µg
Diethylene glycol
C4H10O3
111-46-6
14
 µg
Triethylene glycol
C6H14O4
112-27-6
14
 µg
Tetraethylene Glycol
C8H18O5
112-60-7
14
 µg
Propylene glycol
C3H8O2
57-55-6
6
 µg

* 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.