A spectroscopic method to determine levels of aluminium in tinned baby food is being validated. a) What is the purpose of method validation? Under what circumstances would a laboratory need to have validated methods, and present results from their method validation experiments? (4 marks) b) To determine the detection limit and quantitation limit for the method, ten blank samples were run. The standard deviation of the ten absorbance readings was 0.0005. A 1.00mgL1 standard had an absorbance of 0.092. Using this information, show how you would determine the concentration of aluminium at the limit of detection and limit of quantitation for this method. (4 marks) c) The expected maximum concentration of aluminium in the baby food samples is 2mg L1. Suggest appropriate values for the calibration standards needed to construct a calibration graph. (3 marks) d) The above food testing laboratory is working to become accredited. They have already undertaken the validation of all the tests to be accredited and have implemented a QMS system. They also opted for a pre-assessment visit from UKAS that determined that the organisation was ready for formal assessment. Describe what would happen during the formal assessment visit. Make reference to who would be involved in the assessment visit, their roles and what happens at the end of the assessment