Method 25

Maleic Anhydride by HPLC

This method describes the sample collection and analysis of maleic anhydride. Maleic anhydride is collected with a sampling train consisting of two adsorption tubes connected in series. The first tube contains XAD-2 coated with p-anisidine and the second tube contains untreated XAD-2. The anisidine-maleic anhydride derivative is desorbed with methanol and analyzed by reverse phase HPLC with a UV detector. The untreated XAD-2 sorbent tube is used as an in-series backup to the p-anisidine coated tube.



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Method Data

Hold Times, Preservatives, Preps, Collection, Analytical & Documentation
Holding Time:   The recovery of the analyte from the collection medium after storage must be 75% or greater. Recoveries of greater than 86% were obtained from samples stored for up to 15 days at both ambient (23°C) and refrigerated (5°C) temperatures.
Preservatives:   Keep refrigerated or at ambient temperature. The XAD-2 tube coated with p-anisidine should be shielded from sunlight at all times. Sampling tubes are stable for at least 30 days if kept from light and stored in a freezer.
Required Preps:   XAD-2 sorbent tube coated with 500 mg of p-anisidine followed by an untreated XAD-2 sorbent tube
Collection Method:   Solid sorbent XAD-2 tubes: 20 L @ 0.1 L/min.
Analytical Methodology:   HPLC-UV detection (Reverse Phase)
Documentation:   025

Analyte List*

Analyte Formula CAS Number Detection Limit
Maleic Anhydride

* 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.