DATA HANDLING

1. Chemical concentrations

1.1. molarity (M)

1.2. parts per millions (ppm)

1.3. parts per billions (ppb)

1.4. normality (N)

2. Percent concentrations

2.1. weight percent (wt%)

2.2. volume percent (vol%)

2.3. weight / volume percent (w/v%)

3. Statistical Analysis

3.1. Mean

3.2. Standard Deviation

3.3. Q-test

3.4. F-test

3.5. Student's t test

3.5.1. 1) when accepted value is known

3.5.2. 2) to compare two sample mean

3.5.3. 3) paired t test

4. Steps in Chemical Analysis

4.1. 1) define the problem

4.2. 2) select a method

4.3. 3) sampling

4.4. 4) prepare sample for analysis

4.5. 5) perform any necessary chemical separation

4.6. 6) perform the measurements

4.7. 7) calculate the results and report