The Analytical Process

Question 1

Procuring a representative, small sample to measure

Answer 1

Sampling

Question 2

A liquid above a packed solid

Answer 2

Supernatant liquid

Question 3

composition is the same throughout

Answer 3

homogeneous

Question 4

composition is different throughout the sample

Answer 4

heterogeneous

Question 5

substances being measured

Answer 5

analytes

Question 6

a complete transfer

Answer 6

a quantitative transfer

Question 7

a suspension of a solid in a liquid

Answer 7

slurry

Question 8

to pour off

Answer 8

decant

Question 9

transforming a sample into a state suitable for analysis

Answer 9

sample preparation

Question 10

identifying what an unknown is called

Answer 10

qualitative analysis

Question 11

identifying how much is present

Answer 11

quantitative analysis

Question 12

standard curve

Answer 12

calibration curve

Question 13

samples with known concentrations used to construct a calibration curve

Answer 13

standard solutions

Question 14

set of practices intended to give themselves and their customers confidence in the quality of their results

Answer 14

quality assurance

Question 15

large regions within a substance containing different compositions

Answer 15

segregated heterogeneous material

Question 16

to obtain a representative sample from a segregated heterogeneous material use…

Answer 16

a composite sample

Question 17

where differences within a composition are random and on a fine scale

Answer 17

random heterogeneous material

Question 18

several identical portions

Answer 18

aliquots

Question 19

any chemical of interest

Answer 19

species

Question 20

when a species other then the analyte increases or decreases the response of the method

Answer 20

interference

Question 21

transforming an interference into a form that is not detected

Answer 21

masking