Instrumental Analysis Study guides, Class notes & Summaries

Instrumental Analysis Final Exam Mass Spectrometry (MS) is an analytical technique where molecules or atoms from a sample are ____ - Answer-ionized and separated according to their mass-to-charge ratio and recorded In MS, ions are formed, therefore ____ - Answer-converting back to molecules or atoms is impossible A variety of methods are used to create ions in MS, ____ - Answer-mostly positive ions Atomic Mass Unit (amu) value - Answer-1.66x10^-24 g Definition of amu - Answer-mass...

What is a photomultiplier? - A vacuum tube consisting of a photoemissive cathode, a series of intermediate electrodes called dynodes, and a collection anode. What does a single-beam spectrophotometer do? - A single-beam spectrophotometer employs one beam of radiation that irradiates one cell. What happens in a deuterium lamp? - The lamp energy from the power source produces an excited deuterium molecule that dissociates into two atoms in the ground state and a photon and the energies of th...

Analytical Chemistry - Study of separation, identification, and quantification of chemical components of a material. Standards - Solution of known concentration used to determine an unknown concentration. Instrumental Chemistry - A field within analytical chemistry that studies chemicals through the use of instruments. Forensic Chemistry - The application of chemistry to law enforcement. Separation Science - The theory and practice of separating molecules. Qualitative Analysis - Determini...

transducer - devices that convert information in nonelectrical domains to information in electrical domains and the converse detector - mechanical, electrical, or chemical device that identifies, records, or indicates a change in one of the variables in its environment, such as pressure, temperature, electrical charge, electromagnetic radiation, nuclear radiation, particulates, or molecules sensor - the class of analytical devices that are capable of monitoring specific chemical species co...

Instrumental Analysis First Step in Analytical Method - Answer-Define problem and design the analytical method Second step in Analytical Method - Answer-Sampling and sample storage Third Step in Analytical Method - Answer-Sample preparation Fourth Step in Analytical Method - Answer-Perform measurement Fifth Step in Analytical Method - Answer-Assess data Sixth step in Analytical Method - Answer-Documentation Analyte - Answer-substance to be measured Matrix - Answer-Everyth...

Instrumental Analysis - Exam 1 What makes instrumental analysis different from wet chemistry? - Answer-Instrumental is done with electrically based instruments instrument - Answer-converts physical or chemical characteristics of an analyze to information that can be manipulated and interpreted by humans.... DOES NOT DO WORK (machine). what does all chemical analysis need? i.e. every instrument (3) - Answer-energy source -> system under study -> analytical information (response) ...

Instrumental Analysis Exam 1 transducer - Answer-devices that convert information in nonelectrical domains to information in electrical domains and the converse detector - Answer-mechanical, electrical, or chemical device that identifies, records, or indicates a change in one of the variables in its environment, such as pressure, temperature, electrical charge, electromagnetic radiation, nuclear radiation, particulates, or molecules sensor - Answer-the class of analytical devices that a...

Instrumental Analysis Exam 2

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