RG 2018/09/07

Objective

Create ICP standard solutions in concentrations of 250 ppb, 500 ppb, 1 ppm 2 ppm, 4 ppm, 6 ppm, 8 ppm, and 10 ppm for ICP measurements.

Lab Protocol

ICP Parameters

• Common Conditions

1. 1. replicates: 3
   2. pump speed(rpm): 12
   3. uptake delay(s): 5

• Measurement Conditions

1. 1. read time(s): 5
   2. RF power(kW): 1.20
   3. stabilization time(s): 5
   4. viewing mode: axial
   5. viewing height(nm): 8
   6. nebulizer flow(L/min): 0.70
   7. plasma flow(L/min): 12.0
   8. aux flow(L/min): 1.00
   9. make up flow(L/min): 0.00

• Wavelengths for Given Metal Analyte

1. 1. Pb: 220.253 nm
   2. Cd: 214.439 nm and 500.582 nm
   3. Cu: 327.395 nm and 222.778 nm

Data

1. Theoretical
   1. 1 ppm (0.518 g of 96.5 ppm ICP stock solution filled to 10 g with water)
   2. 250 ppb (2.5 g of 1 ppm ICP solution filled to 10 g with water)
   3. 500 ppb (5 g of 1 ppm ICP solution filled to 10 g with water)
   4. 2 ppm (0.207 g of 96.5 ppm ICP stock solution filled to 10 g with water)
   5. 4 ppm (0.415 g of 96.5 ppm ICP stock solution filled to 10 g with water)
   6. 6 ppm (0.622 g of 96.5 ppm ICP stock solution filled to 10 g with water)
   7. 8 ppm (0.829 g of 96.5 ppm ICP stock solution filled to 10 g with water)
   8. 10 ppm (1.036 g of 96.5 ppm ICP stock solution filled to 10 g with water)
2. Actual
   1. 0.9855 ppm (0.51471 g of 96.5 ppm ICP stock solution, water added till total mass 50.3297 g)
   2. 249.848 ppb (2.53939 g of 0.9855 ppm solution, water added till total mass 10.01435 g)
   3. 499.822 ppn (5.08262 g of 0.9855 ppm solution, water added till total mass 10.02142 g)
   4. 2.1001 ppm (0.21780 g of 96.5 ppm ICP stock solution, water added till total mass 10.00803 g)
   5. 4.2417 ppm (0.44046 g of 96.5 ppm ICP stock solution, water added till total mass 10.02064 g)
   6. 6.3466 ppm (0.66000 g of 96.5 ppm ICP stock solution, water added till total mass 10.03525 g)
   7. 8.0018 ppm (0.83007 g of 96.5 ppm ICP stock solution, water added till total mass 10.0151 g)
   8. 10.1020 ppm (1.04895 g of 96.5 ppm ICP stock solution, water added till total mass 10.02015 g)

Notes

1. The wavelengths were chosen for the specific metals because there was no significant interference with any of the other metals present in the ICP standard solution.

Need to determine what values to plot for ICP data