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Analytical Chemistry ChT - QRC Manual > Nature and Scope of Chemical Analysis > Flashcards

Nature and Scope of Chemical Analysis Flashcards

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1
Q

Application of techniques and methods to obtain and assess qualitative, quantitative, and structural information on the nature of matter.

A

Analytical Chemistry

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2
Q

Processes providing basis for analytical measurements

A

Techniques

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3
Q

Detailed set of instructions for particular analysis

A

Method

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4
Q

Abbreviation

AAS

A

Atomic Absorption Spectroscopy

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5
Q

Set of written instructions on how to apply the method

A

Procedure

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6
Q

Set of written guidelines for sample analysis set by an agency

A

Protocol

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7
Q

What is the characteristic property of this instrumental method?

Kinetic Methods

A

Rate of reaction

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8
Q

What is the characteristic property of this instrumental method?

Potentiometry

A

Electrical potential

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9
Q

What is the characteristic property of this instrumental method?

Amperometry, polarography

A

Electrical current

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10
Q

What is the characteristic property of this instrumental method?

Activation and isotope dilution methods

A

Radioactivity

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11
Q

What is the characteristic property of this instrumental method?

Coulometry

A

Electrical Charge

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12
Q

What is the characteristic property of this instrumental method?

Spectroscopy

A

Absorption of radiation

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13
Q

What is the characteristic property of this instrumental method?

Thermal Gravimetry, DTA, DSC

A

Thermal characteristics

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14
Q

What is the characteristic property of this instrumental method?

Mass spectrometry

A

Mass-to-charge ratio

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15
Q

Component of interest in the sample

A

Analyte

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16
Q

Collection of all components in the sample

A

Matrix

17
Q

Collecting sample whose composition represents the bulk material

A

Sampling

18
Q

Sample containing all components except the analyte

A

Blank

19
Q

Experimental measurement proportional to analyte concentration

A

Signal

20
Q

Portion of a solution subjected to analysis

A

Aliquot

21
Q

Portions of a sample carried through analytical procedure in the exact same way

A

Replicates

22
Q

What are the 2 Central Values?

A

Mean and Median

23
Q

A central value not affected by extreme values or outlier

A

Median

24
Q

Affected by the presence of extreme values

A

Mean

aka Arithmetic mean or average

25
Q

Repeatability of a measurement

A

Precision

26
Q

Measure of the agreement between the experimental result and true value

A

Accuracy

27
Q

What type of error?

Causes data to be more scattered or less symmetrically around the mean

A

Random or Indeterminate Error

28
Q

What type of error?

Causes the mean of a set data to differ from the accepted value

A

Systematic or Determinate Error

29
Q

What type of error?

Large and may causes result to be either high or low

A

Gross Error

Analytical Chemistry ChT - QRC Manual (2 decks)

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