Method 2008

Chloroacetic Acid by GC/FID


This method is for the determination of chloroacetic acid. The sample is collected on silica sorbent tubes, desorbed in 2 mL deionized water, and analyzed by GC/FID. The working range is 0.09 to greater than 85 ppm (0.3 to 30 mg/m³) for a 3 L air sample. Chloroacetyl chloride is a positive interferent since it is hydrolized to monochloroacetic acid by the measurement procedure and is efficiently collected by silica gel. Particulate salts of the acid are positive interferents. Note: This method revises P&CAM 332. The columns used in P&CAM 332 are no longer available and the newer columns used in this method show improvements in the analytical range and sensitivity.


(NIOSH Issue 2: 15 August 1994)

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Method Data

Hold Times, Preservatives, Preps, Collection, Analytical & Documentation
Holding Time:   At least 7 days from sampling to analysis if kept at 25°C and 32 days from sampling to analysis if kept refrigerated
Preservatives:   Store refrigerated or at 25°C.
Required Preps:   Solid sorbent tube: silica gel, 100mg/50mg, 7cm x 6mm OD x 4mm ID
Collection Method:   Solid sorbent tube: 1 - 100 L @ 0.05 - 0.2 L/min.
Analytical Methodology:   GC/FID
Documentation:   2008

Analyte List*

Analyte Formula CAS Number Detection Limit
Monochloracetic Acid (MCAA)
C2H3ClO2
79-11-8
0.04
 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.