Needle‐trap device for the sampling and determination of chlorinated volatile compounds

Abstract

A needle-trap device, with immobilized sorbent inside the syringe, coupled with GC-MS was applied for air sampling and determination of chlorinated volatile organic compounds such as dichloromethane, trichloromethane, and tetrachloromethane. The application of a needle trap packed with combination of three sorbents including Tenax TA, Carbopack X, and Carboxen 1000 resulted in detection limits of few pg for chlorinated volatile compounds and recoveries of 99.2-102.8%. The extraction and desorption parameters were optimized within the study. As a result, the precision determined as RSD was equal to 5.05 and 3.03 and 6.52% for dichloromethane, trichloromethane, and tetrachloromethane, respectively. The storage time for chlorinated compounds up to 48 h and reusability of the needle-trap device were verified. The obtained results have proved the ability of needle traps to compete with other solventless sampling and sample preparation extraction techniques.

Development of a needle trap device packed with titanium‐based metal‐organic framework sorbent for extraction of phenolic derivatives in air

“…In recent years, NTD has attracted much scientific interest from many researchers, due to its advantages . In this regard, in previous researches, a wide variety of commercial and synthetic adsorbents have been used in NTD for determination of different compounds . Metal‐organic frameworks (MOFs) are porous structures that were presented by Rabson and Hoskins in the early 1990s.…”

A core–shell titanium dioxide polyaniline nanocomposite for the needle‐trap extraction of volatile organic compounds in urine samples

“…SPME, headspace, and purge and trap extraction are the most common techniques for real sample treatments . Recently, a needle‐trap device (NTD) has been introduced for simple and rapid determination of VOCs in conjunction with GC . In this technique, appropriate amount of a particular sorbent is packed inside a syringe barrel and used for the extraction process followed by the thermal desorption of analytes.…”

Needle Trap Device as a New Sampling and Preconcentration Approach for Volatile Organic Compounds of Herbal Medicines and its Application to the Analysis of Volatile Components inViola tianschanica

“…Most reported studies on NTD have focused on developing new types of sorbents to effectively extract a wide range of VOCs. Consequently, many commercially available sorbents (De Crom et al, 2010;Dobrzynska and Buszewski, 2013) and chemically synthesised polymers (Bagheri et al, 2011a;Alonso et al, 2012;Gholivand and Abolghasemi, 2012), as well as different sorbent combinations (multi-bed-type needles), have been investigated for their potential applications in VOCs analysis. Many NTD applications have been proposed for VOCs analysis in gaseous samples (such as ambient and indoor air samples, and breath gas analysis) and aqueous samples (such as waste water, seawater, whole blood, and natural oils) (Lord et al, 2010;Ueta and Saito, 2014).…”