Question

Please help me answer this question for my Analytic Chemistry subject. PLEASE answer it seriously and completely, or better not answer it if not then, really appreciate it, thank you.

2. (a) The following standard solutions were used in determining Al in an aqueous solution. A flame atomic emission spectrometer was used. Solution Al concentration (ppb)Emission reading Standard solution 1 1.0 0.45 Standard solution 2 10.0 4.05 20.0 Standard solution 3 8.55 Standard solution 4 50.0 22.15 44.05 Standard solution5 100.0 GB01 sample 0.0 BL01 sample 74.50 Construct an appropriate calibration curve based on those standard solutions (graph paper is not needed). (i) Detemine the concentrations of Al in BL01 sample. Show how that value is obtained. (ii) Can the concentration of Al in BL01 be accurately determined using the calibration curve? Give reason(s) for your answer iv) Ifneeded, suggest a way to improve the determination of Al concentration in BL01 sample. (b) (i)Draw a schematic diagram of a high performance liquid chromatography-mass spectrometry instrument (HPLC-MS). Label all the components. (ii) What are the two most critical component in the HPLC-MS instrument? Give reason(s) to your answer

Answer 1

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