lecture_1_Data Analysis and Statistics

lecture_1_Data Analysis and Statistics - Instrumental...

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Chemistry Problems Tools Report Analytical Instrumental analyte identification, mixture separation. various optical and electronic instrumentations. data analysis and statistics ( lecture 1 & 2 ).
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Basic Components of an Instrument Stimulus (energy source) System Under Study Response (analytical information) Signal Readout Read Chap. 2-4 for details about the different components. Reading and understanding of these three chapters are recommended, but not covered in the exams.
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Chemical Analysis Qualitative Analysis Quantitative Analysis Identification / characterization of the analytes: What elements or compounds are present in the system under investigation? Determination of the amount or concentration of the analyte: How much elements or compounds are present in the system under investigation? Most of the current instrumentations can do both qualitative and quantitative analysis.
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Lecture 1. Data Analysis z Data Statistics --- evaluation of data quality z Linear Fitting (Method of Least Squares) --- quantitative measurement & instrument calibration Readings: Chap. 1, Appendix 1
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Some useful terms: Analyte : the substance to be identified or quantified. Sample : the mixture containing the analyte. Standard : is a sample with known concentration of analyte which is otherwise similar o the composition of unknown samples. Calibration curve : a plot of signal vs. concentration for a set of standards. It is often linear within intermediate concentration range, but turns to be nonlinear at high and low concentrations. The linear part is called Dynamic Range .
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lecture_1_Data Analysis and Statistics - Instrumental...

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