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Investigating the Applicability of Direct Analysis and Ion Motility TOF MS for Environmental Analysis

Waters
21 May 2013

This application note investigates the use of Direct Analysis (DA) combined with ion mobility separation (IMS) and mass spectrometry (MS). This particular case examines samples that are directly infused and evaluates the benefits of IMS. DA/IMS/MS offers a route to rapidly screen for known pesticides with minimal sample preparation. The mobility separation is combined with the specificity of accurate mass measurement <1 ppm, as well as the ability to obtain MS/MS structural elucidation data on the mobility resolved analytes. Results illustrating how mobility resolution is used to distinguish four pesticides with the same nominal mass, demonstrating how molecule shape can be used to produce mobility separation and separation power is enhanced by using CO2 as the mobility drift gas.

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Sample PreparationSample preparation can improve the quality and speed of separation techniques. Products to assist sample preparation include filtration equipment, evaporators, membranes and sieves.Mass SpectrometryMass spectrometry (MS) is a powerful analytical technique used to identify and quantify molecules based on the mass-to-charge ratio of gas-phase ions. It provides detailed information about the structure, composition, and properties of compounds and is widely used across fields such as environmental monitoring, materials science, drug discovery and development, food and beverage testing, and wider chemical research. Key MS techniques include tandem mass spectrometry (MS/MS), liquid chromatography–mass spectrometry (LS-MS) and inductively coupled plasma (ICP-MS). Choosing from these wide range of techniques and technologies can be a daunting task, so keep up to date with scientific applications, performance expectations, and customer reviews here all in one place. Visit our product directory to receive quotes direct from the manufacturer. Environmental Monitoring and TestingEnvironmental monitoring and testing uses handheld portable analyzers, kits, spectrometers or chromatography systems for air, water, soil, food and other sample testing. Useful features of analyzers such as BOD and COD include portability, easy calibration, automation and sensitivity.  Environmental test kits for pH, water, moisture, etc, should be accurate, sensitive, reliable, fast and easy to use.PesticidesPesticides are used to protect crops from diseases, pests and unwanted plants. They are classed as persistent organic pollutants (POPs) and can be harmful to humans. The Environmental Protection Agency (EPA) currently regulates the use of pesticides in the USA. Ion SeparationEnvironmental ContaminationContaminants in the environment are harmful chemicals that are present in the air, land and water. These include pesticides, pharmaceuticals, persistent organic pollutants (POPs) and many more.

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Investigating the Applicability of Direct Analysis and Ion Motility TOF MS for Environmental Analysis