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Environmental
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Detection of PFOS pollutants
Environmental water screenings are regularly challenged by the number and diversity of chemical and biological targets in a given sample. Traditional chromatographic separation can be insufficient to discriminate between closely related compounds or meet established detection limits. The combination of the Bruker TargetScreener LC method with trapped ion mobility spectrometry via the Bruker timsTOF Pro system enables rapid discrimination of PFOS pollutants, including isomers, with significantly improved target detection sensitivity.
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Microplastic Analysis and Additive Screening using Thermal Desorption/ Pyrolysis (TDP) DART-MS
Microplastics are more often appearing as contaminants in important water sources including our oceans and drinking supply. These small particles are not a single type of contaminant but a wide variety consisting of flame retardants, plastic stabilizers, and colorants. The presented TDP-DART-HRMS method requires no sample preparation and allowed for the rapid and direct screening of plastics of known and unknown sources without the need of any chromatographic separation. Three types of plastics were evaluated: polyethylene terephthalate (PET), polypropylene (PP), and low-density polyethylene (LDPE) from various sources. Additionally, an unknown plastic was analyzed. The unique combination of thermal desorption, direct ionization, high-resolution mass spectrometry and sophisticated postprocessing software for statistics and compound identification resulted in a improved detection and characterization of these concerning contaminants. The resulting high-resolution MS and MS/MS data was quickly processed and used to match against existing libraries with successful identification of the components that were present in the unknown sample.
Q
Quantitation of PFAS in Water by LC-HR-QTOF MS/MS
Per- and polyfluorinated alkyl substances (PFAS) are a diverse group of extensively used industrial chemicals. They are classified as persistent pollutants, with known environmental accumulation and global circulation. Due to their suspected toxicity, they are a growing threat to both humans and wildlife, and thus their analysis is an increasingly important task for analytical chemists. In this application a method of quantification of PFAS in water using a time-of-flight (QTOF) mass spectrometer is presented. In addition to the rapid, automated, and confident detection of expected and targeted PFAS compounds, analysis via this high resolution QTOF system offers the unique potential to detect unexpected or novel PFAS via retrospective reviewing of data sets. An unlimited number of compounds may be targeted in each run, and processing methods may be easily extended to include new PFAS compounds, providing flexibility for current and future regulatory criteria.
- AppNote LCMS-207_PFAS-impact
1615 kB
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TargetScreener 4D workflow: Providing solutions in environmental monitoring studies
Thousands of chemicals originating from anthropogenic sources are released daily into the environment. Therefore a comprehensive and systematic environmental monitoring is necessary for the establishment of effective mitigation measures for contaminants with persistent bioaccumulative and toxic characteristics (PBT). In this study, a CCS-aware database was etablished, containing LC-ESI-TIMS-HRMS data of more than 1,000 environmental contaminants, typically found in environmental matrices. The included compounds belonged to several classes, such as pharmaceuticals, personal care products, drugs of abuse, pesticides, as well as their transformation products. As test samples, different environmental matrices were utilized, representing the challenge and needed performance for a comprehensive screening approach. Trapped Ion Mobility Spectrometry (TIMS) coupled to High Resolution Mass Spectrometry (HRMS) were used to enhance the reliable identification of contaminants.