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- What is the difference between a primary and a secondary standard? Give an example of each.Explain the differences between the following calibration methods and why they are needed. a) External standard; b) Standard addition; c) Internal standard1a. List THREE (3) advantages of internal standardization method than normal calibration.
- [References) A method for the determination of the corticosteroid methylprednisolone acetate in solutions obtained from pharmaceutical preparations yielded a mean value of 3.7 mg mL with a standard deviation of 0.3 mg mL. For quality control purposes, the relative uncertainty in the concentration should be no more than 3%. How many samples of each batch should be analyzed to ensure that the relative standard deviation does not exceed 9% at the 95% confidence level? samplesRelate the following terms: Calibration, Reference Material, and Chemical Standard. *Q3. A cellulose coating that weighs at least 3.00 mg is often applied to the exterior of vitamin C tablets in order to delay the release of active ingredients. A random sampling of 100 vitamin tablets revealed that 6 vitamin tablets failed to meet the required weight of the cellulose coating. (а) Calculate the relative standard deviation (in %). (b) Determine the number of tablets should be taken into consideration to ensure a relative standard deviation of 15 %.
- Categorize each as a determinate or an indeterminate error and further classify determinate errors as instrumental, method or personal. a) An unknown sample being weighed is hygroscopic. b) One component of a mixture being analyzed quantitatively by GC reacts with the column packing. c) A radioactive sample being counted repeatedly without any change in condition yields a slightly different count at each trial. d) The tip of the pipet used in the analysis is broken. e) In measuring the same peak heights of a chromatogram, two technician each report different heights.if we want to prepare acertizen tablet each tablet contain 10mg of drug and the equation for calibration curve of acertizen is y= 0.035x + 0.0148 absorbance 1 = 0.323 absorbance 2 = 0.406 the concentration of drug in absorbance 2 in mg /900ml Choose... + the percentage of drug Choose... release in abs2 the percentage of drug release in abs1 Choose... + the concentration of Choose... + absorbance 1 in mg /900ml the concentration of absorbance 2 in microgram Choose... /mlThis question is not an accredited question