Compare the instruments used for flame atomic absorption spectroscopy and inductively-coupled plasma atomic emission spectroscopy, commenting on the similarities and differences between the systems. An analysis of the active ingredient

(B) of a tablet by UV spectrometry was carried out as follows: 2.5436 g of powdered tablet was dissolved in acid(10 cm³) and the digest diluted to 100 cm3 in a volumetric flask to form the sample solution. A 10 cm³ aliquot of the sample solution was pipetted into a second 100 cm³ volumetric flask along with excess of a reagent which reacted 1:1 with B to form a coloured product and the mixture diluted to volume. A sample of the test solution was placed in a 1 cm path length cell and the absorbance measured at 537 nm. This was found to be 0.301. Table1 shows the absorbance of a series of standard solutions of the coloured product. Using a graphical method, calculate the concentration of B in the test solution and hence, given that the relative molecular mass of B is265.1 g mol1, calculate the dose of B administered from a 250 mg tablet made from the powder.