For PE ICP 1) Accurately weigh to t

For PE ICP 1) Accurately weigh to two decimal places (in duplicate) 25 grams of sample into a 1000 ml beaker2) Add 100ml concentrated nitric acid and heat this mixture (just below boiling point) for ½ hour.3) Filter the solution in a 500 ml volumetric flask.4) Add 50ml 15% KI and dilute to volume with DI water. Mix thoroughly and allow to sit for at least 50 minutes.Preparation of Standard Solutions:For JY ICP1) To each of three 100 ml volumetric flasks add approximately 50 ml of DI water and slowly add 10 ml 45% KOH and 25 ml HCl. Mix and allow to cool.2) To make high, mid, and low standards, add As and Sb to the flasks to obtain the concentrations shown below. Dilute to volume with DI water and mix. Transfer solutions into 125 ml plastic bottles and pipet 10 ml of 15% KI solution into each. Mix thoroughly and allow to sit for at least 50 minutes.