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What is two types of ionization method in GC MSD?
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- 7. What variables can cause the pH range of anindicator to shift?How is matrix selected in soft ionization? Give three examples.1. What is the type of titration is involved this method? Direct Indirect Residual Blank 2. What is the weight (in grams) to be used? 3. What is the molecular weight to be used? 4. What is the computed molar concentration of EDTA?
- Which of the following ionization techniques are combine with TOF analyzers? I. MALDI II. ESI III. EI a. I and II b. Only I c. I, II and III d. II and III e. I and IIIWhat is difference between SPE and DSPE?You have a concentrated sample solution of a new wine from a winery to analyze for malic acid content. once you have worked up the sample and done one 5x dilution you record an absorbance of .395 at the analytical wavelength of the malic acid. the molar absorptivity coefficient E of the malic acid for this method of measurement is 15.84 mM-1cm-1. What was the molarity of malic acid in original wine sample mM?
- create a qulaitative analysis separations flow chart for the separation of Zn2+, Al3+, Fe3+Metal ions chelate polar groups of analyte molecules for longer retention time. Does this affect chromatogram of RPHPLC?Why is the electrometric method of pH determination more accurate than the colorimetric method?
- A weak acid, HA, has a pKa of 6.5. If you are utilizing ion-exchange chromatography with an anion exchange resin, what pH range is beneficial to the binding to the stationary phase? And Why?List three typical examples applications of SFC analysis.When using ion-selective electrodes, to comensate for a complex or unknown matrix, the __________ method can be used to determine the analyte concentration. a) least-squares analysis b) standardization c)standard addition d)dilution e)calibration curve