As a result of the persistent nature of chlorinated compounds in the environment there is still a critical need for monitoring these compounds. In this study EPA Method 608ATP3M0222 is used as the approved SPE disk technique for wastewater extraction.

A comprehensive approach to the analysis of volatile (purgeable) organics in waste and wastewater allows straightforward achievement of method quality control requirements, with excellent sensitivity and linearity across the entire list of volatile organic compounds specified in the method.

This application describes the analysis of two key taste and odour compounds in drinking water using solid-phase microextraction and gas chromatography–mass spectrometry to achieve detection limits of ,0.4 ppt (0.4 ng/L) for each compound.

Pesticides are widely used by farmers to control pests, weeds and molds that would otherwise decrease crop production. While this has significantly increased worldwide food productions, these same pesticides pose health risks to humans. The restrictions for specific pesticides differ from one country to the next and as world trade increases, the potential threat to other countries' populations increases. For this reason, pesticides and other food related allergens are currently the subjects of increasing scrutiny and regulation.

PLOT columns are often used in GC analyses when it is necessary or desirable to retain one class of solutes in favour of other solutes that have little or limited interactions with the surface of the stationary phase. With a PLOT column, chromatographers can even cause lower boiling point compounds to elute well after higher boiling point compounds, thus providing better qualitative and quantitative separations for the solutes of interest.

Pesticides are used throughout the world to control pests that are harmful to crops, animals, or people. Because of the danger of pesticides to human health and the environment, regulatory agencies control their use and set pesticide residue tolerance levels. The limits of detection (LODs) for many of these substances are at the parts-per-trillion (ppt) level. To achieve this level of detection, off-line sample pre-concentration is often performed. However, these sample preparation procedures can be time consuming, adding as much as one to two days to the total analysis time. Therefore, a method for on-line sample pre-concentration that bypasses the off-line sample pre-concentration provides a significant time savings over conventional methods.