https://ogma.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:50037 Thu 29 Jun 2023 14:10:43 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:34100 0.999 with enhanced limits of detection and limits of quantification values. The method was applied to real samples for routine environmental monitoring of TPHs in an Australian contaminated site characterized by refueling station. Analysis of groundwater samples in the area showed a wide range of TPH concentrations as follows: 66–1,546,000 (C₁₀–C₁₄), 216–22,762 (C₁₅–C₂₈) and 105–2,103 (C₂₉–C₃₆) μg/L. This method has detected trace levels, thereby measuring a wider concentration range of TPHs. These more accurate measurements can lead to the appropriate application of risk assessments and remediation techniques.]]> Thu 07 Feb 2019 14:26:26 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:8037 Sat 24 Mar 2018 08:35:04 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:46262 Symbiodinium tridacnidorum and Durusdinium trenchii) using gas chromatography–mass spectrometry (GC–MS) and comprehensive two-dimensional gas chromatography–time-of-flight mass spectrometry (GC x GC–TOFMS). Seven chemical classes were detected by both instruments, the most common being aromatic hydrocarbons. However, GC x GC resolved seven times more BVOCs than GC–MS (290 vs. 40), with a higher proportion of compounds tentatively identified (173 vs. 14). Notably, nine chemical classes were exclusively identified by GC x GC, including alkane, alkene, aldehyde, ester, and nitrile BVOCs—each potentially fulfilling undescribed functions in marine organisms. The microalgal species investigated shared a large proportion of BVOCs, and this result was consistent across instruments (97 and 98% shared compounds via GC x GC and GC–MS, respectively), suggesting consistent retrieval of general patterns between instruments. This method comparison is the first of its kind in marine systems and confirms the greater analytical power of GC x GC, required to help resolve complex BVOC emissions and the identification of their roles in marine systems.]]> Mon 14 Nov 2022 15:58:32 AEDT ]]>