Analysis of 2-Methylisoborneol and Geosmin in Drinking Water by GC-MS and SPME Arrow

User Benefits

- SPME Arrow offers highly durable and sensitive trace analysis. - Using SPME Arrow not only provides cost savings in the long run but also eliminates the need for the salting-out technique, contributing to overall cost efficiency.

Introduction

2-methylisoborneol (2-MIB) and geosmin are responsible for earthy and musty odors which can affect the taste of drinking water. Hence, the analysis of these compounds in watersourcesis important due to their significant impact on water quality and taste. As humans can perceive them at trace levels (ng/L)[1], it is crucial to detect them at this concentration. The Solid Phase Microextraction (SPME) Fiber technique paired with GC-MS has been used to detect these two organic compounds previously; however, salting-out is often required to improve sensitivity. Moreover, if the salt purity is insufficient, it may lead to contaminants co-eluting with the target compounds. This application news introduces a study utilizing GC-MS with SPME Arrow to effectively detect and quantitate the concentration of geosmin and 2-MIB in drinking water samples. Notably, salting-out is not required, and a limit of quantitation of 1 ng/L still can be achieved, with area %RSD (n=5) for 2-MIB and geosmin being less than 5 %. The spike recovery study at concentrations of 1 ng/L yielded recoveries within 70 % to 130 %.

February 17, 2025 GMT