Method 45


This method describes the sample collection and analysis of 2,3,4,6-Tetrachlorophenol. Samples are collected by drawing a known volume of air through a sampling device consisting of two specially prepared XAD-7 adsorbent tubes which are connected in series. Following desorption with methanol, the samples are analyzed by high performance liquid chromatography (HPLC) with ultraviolet (UV) detection. Special requirements: The special sampling device must be obtained from the laboratory. It contains two XAD-7 adsorbent bed sections which are used for trapping vapor components; a glass fiber filter for trapping aerosols, and a XAD-7 "cap" section. The XAD-7 "cap" tube is used as a precautionary measure to prevent the loss of volatile components which may have collected on the filter during sampling. The "cap" tube must be removed from the front section of the sampler prior to sampling and reattached at the end of the sampling period.



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Method Data

Hold Times, Preservatives, Preps, Collection, Analytical & Documentation
Holding Time:   Al least 17 days.
Preservatives:   Store at room temperature.
Required Preps:   Solid sorbent XAD-7 sampling tubes connected in series: 5cm x 8mm)D x 6mmID; 175mg resin.
Collection Method:   Solid sorbent XAD-7 tubes: 48 L at 0.2 L/min.
Analytical Methodology:   HPLC/UV.
Documentation:   045

Analyte List*

Analyte Formula CAS Number Detection Limit

* 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.