BASIC ANALYTICAL PROCESS

Question 1

BASIC ANALYTICAL PROCESS

Answer 1

Select a method
Acquire the sample
Process the sample

Question 2

[SELECT A METHOD]
Considerations:

Answer 2

1. Level of Accuracy required
2. Number of samples to be analyzed
3. Complexity of sample and number of
   components to be analyzed

Question 3

1. Level of Accuracy required
2. Number of samples to be analyzed
3. Complexity of sample and number of
   components to be analyzed

Answer 3

Selecting a Method

Question 4

The sample should be carefully identified and collected as to represent the entire bulk
material

Answer 4

[ACQUIRE THE SAMPLE]

Question 5

[PROCESS THE SAMPLE]

Answer 5

1. Preparing laboratory samples
2. Defining replicate samples
3. Preparing Solutions – perform physical or chemical changes

Question 6

Types of Sample and Methods

Answer 6

ELiminating Interferences
Calibrating and Measuring Concentration of Property X
Calculating Results
Evaluating the results by Estimating reliability

Question 7

– is a species that causes error by enhancing or attenuating the quantity being measured

Answer 7

Interferences

Question 8

Selection of reagents or methods to be used that
minimize interferences should be done.

Answer 8

Selectivity

Question 8

Selection of reagents or methods to be used that
minimize interferences should be done.

Answer 8

Selectivity

Question 9

These computations are based on the raw data collected in the measurement step, the characteristics of the measurement.

Answer 9

[CALCULATING RESULTS]

Question 10

The experimenter must provide some measure of the uncertainties associated with computed results if the data are to have any value

Answer 10

[EVALUATING THE RESULTS BY ESTIMATING RELIABILITY]

Question 11

→ is the process of collecting a small mass of a material whose composition accurately represents the bulk of the material being sampled.

Answer 11

SAMPLING

Question 12

It is the most difficult aspect of
analysis.

Answer 12

SAMPLING

Question 13

“Samples are analyzed, but species or concentrations are _______”

Answer 13

determined

Question 14

Analysis of ________ are
complicated because of the presence of sample matrix

Answer 14

real samples

Question 15

must ensure that the items chosen are representative of the bulk of material or population.

Answer 15

Sampling process

Question 16

• representative samples that are collected from the source.

Answer 16

Gross Samples

Question 17

Laboratory Samples - samples that are reduced
in size and being homogenized so that they are
measurable in the lab.