Method 1500

Hydrocarbons, 36-126°C Boiling Point


This method is for the determination of OSHA regulated hydrocarbons included within the boiling point range of n-pentane through n-dodecane.  The sample is collected on a charcoal tube, desorbed with carbon disulfide and analyzed using GC/FID (flame ionization detector).  Sampling breakthrough volumes may be reduced with high air humidity.  Volatile organic solvents such as alcohols, ketones, and halogenated hydrocarbons are potential interferences with the analysis.

NOTE: This method is based on and supercedes Methods P&CAM 127 (benzene and toluene), S28 (cyclohexane), S82 (cyclohexene), S89 (heptane), S90 (hexane), S94 (methylcyclohexane), S311 (benzene), S343 (toluene), S378 (octane), and S379 (pentane). For benzene or toluene determinations in complex mixtures of alkanes (= C10), NIOSH 1501 for aromatic hydrocarbons is more selective.


(NIOSH Issue 2: 15 August 1994)

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Method Data

Hold Times, Preservatives, Preps, Collection, Analytical & Documentation
Holding Time:   The method states the sample is stable for 30 days if kept at 5°C.
Preservatives:   None specified in the method.
Required Preps:   Charcoal tube, 100mg/50mg (SKC 226-01)
Collection Method:   The method recommends a flow rate of 0.05-0.20 L/min. and a sample collection volume of 2-30 L. The flow rates and collection volumes can vary by analyte, refer to Table 3 of the method for hydrocarbon specific information.
Analytical Methodology:   GC/FID
Documentation:   1500

Analyte List*

Analyte Formula CAS Number Detection Limit
Methylcyclohexane
C7H14
108-87-2
0.01
 mg
Pentane
C5H12
109-66-0
0.01
 mg
Hexane
C6H14
110-54-3
0.01
 mg
Cyclohexane
C6H12
110-82-7
0.01
 mg
Cyclohexene
C6H10
110-83-8
0.01
 mg
Octane
C8H18
111-65-9
0.01
 mg
Nonane
C9H20
111-84-2
0.01
 mg
Undecane
C11H24
1120-21-4
0.01
 mg
n-Dodecane
C12H26
112-40-3
0.01
 mg
Decane
C10H22
124-18-5
0.01
 mg
Heptane
C7H16
142-82-5
0.01
 mg
Benzene
C6H6
71-43-2
0.01
 mg

* 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.