Chemistry 155 Introduction to Instrumental Analytical Chemistry

Chem 155 Unit 1 Page 40 of 3134. What concentrations ‘bracket’ the 5.6 ppthtarget?For example:5.2, 5.4, 5.6, 5.8, 6.0 ppth--- or ---1, 2, 4, 6, 8 ppth--- or ---1, 2, 5, 10, 15 ppth--- or ---0.050, 0.50, 5.0, 50, 500 ppthDo you need to makestandards on an evenspacing?No – but calibrationpoints above andbelow the std. areneeded.Does the analytehave to fall right in themiddle of thecalibration standards?No, but itminimizeserror!5. What volumes of standards should you prepare?How much is needed by the instrument?What is the smallest volume that you canconveniently and precisely measure?How expensive is the analyte and solvent?How expensive is it to dispose of the waste?0.1 or 1 or 10 or 100 or 1000 mLPage 40 of 313