Nature and Scope of Chemical Analysis Flashcards by Cathrina Chavez

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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Q

Processes providing basis for analytical measurements

A

Techniques

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Q

Detailed set of instructions for particular analysis

A

Method

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Q

Abbreviation

AAS

A

Atomic Absorption Spectroscopy

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Q

Set of written instructions on how to apply the method

A

Procedure

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Q

Set of written guidelines for sample analysis set by an agency

A

Protocol

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Q

What is the characteristic property of this instrumental method?

Kinetic Methods

A

Rate of reaction

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Q

What is the characteristic property of this instrumental method?

Potentiometry

A

Electrical potential

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Q

What is the characteristic property of this instrumental method?

Amperometry, polarography

A

Electrical current

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Q

What is the characteristic property of this instrumental method?

Activation and isotope dilution methods

A

Radioactivity

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Q

What is the characteristic property of this instrumental method?

Coulometry

A

Electrical Charge

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Q

What is the characteristic property of this instrumental method?

Spectroscopy

A

Absorption of radiation

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Q

What is the characteristic property of this instrumental method?

Thermal Gravimetry, DTA, DSC

A

Thermal characteristics

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Q

What is the characteristic property of this instrumental method?

Mass spectrometry

A

Mass-to-charge ratio

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Q

Component of interest in the sample

A

Analyte

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Q

Collection of all components in the sample

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A

Matrix

Q

Collecting sample whose composition represents the bulk material

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A

Sampling

Q

Sample containing all components except the analyte

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A

Blank

Q

Experimental measurement proportional to analyte concentration

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A

Signal

Q

Portion of a solution subjected to analysis

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A

Aliquot

Q

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

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A

Replicates

Q

What are the 2 Central Values?

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A

Mean and Median

Q

A central value not affected by extreme values or outlier

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A

Median

Q

Affected by the presence of extreme values

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A

Mean

aka Arithmetic mean or average

Repeatability of a measurement

Precision

Measure of the agreement between the experimental result and true value

Accuracy

# What type of error? Causes data to be more scattered or less symmetrically around the mean

Random or Indeterminate Error

# What type of error? Causes the mean of a set data to differ from the accepted value

Systematic or Determinate Error

# What type of error? Large and may causes result to be either high or low

Gross Error