Introduction (Chapter 1) Classification of Analytical Methods Qualitative instrumental analysis is that measured property indicates presence of analyte in matrix Quantitative instrumental analysis is that magnitude of measured property is proportional to concentration of analyte in matrix Species of interest All constituents including analyte Matrix-analyte =concomitants Often need pretreatment-chemical extraction,distillation, separation,precipitation (A)Classical: Qualitative-identification by color,indicators,boiling points, odors Quantitative -mass or volume (e.g.gravimetric,volumetric) (B)Instrumental Qualitative -chromatography,electrophoresis and identification by measuring physical property (e.g.spectroscopy,electrode potential) Quantitative-measuring property and determining relationship to concentration(e.g.spectrophotometry,mass spectrometry) Often,same instrumental method used for qualitative and quantitative analysis CEM 333 page 1.3 Introduction (Chapter 1) Classification of Analytical Methods Qualitative instrumental analysis is that measured property indicates presence of analyte in matrix Quantitative instrumental analysis is that magnitude of measured property is proportional to concentration of analyte in matrix Species of interest All constituents including analyte. Matrix-analyte =concomitants Often need pretreatment - chemical extraction, distillation, separation, precipitation (A) Classical: Qualitative - identification by color, indicators, boiling points, odors Quantitative - mass or volume (e.g. gravimetric, volumetric) (B) Instrumental: Qualitative - chromatography, electrophoresis and identification by measuring physical property (e.g. spectroscopy, electrode potential) Quantitative - measuring property and determining relationship to concentration (e.g. spectrophotometry, mass spectrometry) Often, same instrumental method used for qualitative and quantitative analysis CEM 333 page 1.3