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Suggest an experimental procedure for the determination of copper and zinc in tissue samples with AAS.
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- In order to analyse mercury with AAS, which method will you prefer?Why is glass better than fused silica as a prism construction material for a monochromator to be used in the region of 400 to 80 nm?What is the purpose of adding the KSCN near the end of the unknown analysis of copper using indirect iodometic analysis?
- Why is it necessary to buffer the solution to a pH between 10 and 12 during the complexometric determination of magnesium using EDTA?In order to analyse mercury with AAS, which method will you prefer? Explain this method in detail.What are the conditions for a successful gravimetric analysis. Define nucleation. What conditions are important for this stage.
- What is the theory of colorimetric determination of iron in the tap water sample?why did you not need to accurately weigh out ki used in the standard and unknown analysis for indirect iodometric analysis of copper?The result of a TLC experiment showed that Compound X has an Rf values of 0.25 on a silica plate using 10% ethyl acetate in hexane as the mobile phase. Indicate if the Rf values of Compound X would be higher or lower in the following solvents: HEXANE
- The result of a TLC experiment showed that Compound X has an Rf values of 0.25 on a silica plate using 10% ethyl acetate in hexane as the mobile phase. Indicate if the Rf values of Compound X would be higher or lower in the following solvents: TOLUENEFor each of the following experiments, try to identify the major probable sources of random and systematic errors, and consider how such errors may be minimized: 1. The iron content of a large lump of ore is determined by taking a single small sample, dissolving it in acid, and titrating with ceric sulphate after reduction of Fe (III) to Fe (II). 2. The same sampling and dissolution procedure is used as in (a) but the iron is determined colorimetrically after addition of a chelating reagent and extraction of the resulting colored and uncharged complex into an organic solvent. 3. The sulphate content of an aqueous solution is determined gravimetrically with barium chloride as the precipitant.Sketch a flow injection apparatus for the determination of sodium sulfite in aqueous samples.