Lead Metal

2.4.2 Chemicals Due to the strict requirements of the measurement, distilled water and chemicals must be of high purity. During the research process, we used the following chemicals: 1. Merck HNO3 Acid 65 % 2. Merck 37% HCl Acid 3. CH 3 COONH 4 solid Merck 4. NH 2 OH.HCl solid Merck 5. CH 3 COOH ...

From that we have: Standard Deviation (S): 0.1532 Mean: 0.45 Degrees of Freedom (n-1): 6 The t value is checked in the table with 99% confidence: 3.143 GHPH= t X S = 3.143 X 0.153 = 0.48(  g/l). 3.9 Analysis of lead and cadmium in sediment and soil samples 3.9.1. Analysis of lead and cadmium in ...