Analytical: Definitions

Question 1

Quantitative analysis

Answer 1

Measures the proportions of each component present in a sample

Question 2

Qualitative analysis

Answer 2

Identifies which compounds are present in a sample

Question 3

Component

Answer 3

A chemical compound, ion or element, I.e all the components together form the material being analysed

Question 4

Sample

Answer 4

A smaller representative part of the material to be analysed

Question 5

Analyte

Answer 5

A particular component to be identified or measured

Question 6

Interference

Answer 6

Any process or component that causes the wrong answer from chemical analysis to be obtained

Question 7

Gravimetric analysis

Answer 7

Measure the mass of (a compound of) the analyte

Question 8

Titrimetric

Answer 8

Measure the quantity of a reagent that reacts with the analyte

Question 9

Spectroscopic

Answer 9

Measure the intensity of electromagnetic radiation absorbed or emitted by the analyte

Question 10

Electrochemical

Answer 10

Measure the current, voltage or conductivity due to the presence of analyte

Question 11

Radiochemical

Answer 11

Measure the nuclear radiation (number of radioactive particles) emitted by the analyte

Question 12

Accuracy

Answer 12

The closeness of the measurement to the “true” result

Question 13

Precision

Answer 13

The closeness of a series of measurements to each other

Question 14

Titrant

Answer 14

The reagent

Question 15

Titrand

Answer 15

The analyte