Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Analytical Chemistry > Important Terms in AnaChem > Flashcards

Important Terms in AnaChem Flashcards

1
Q

The difference between measured or inferred value and the actual value of a quantity

A

ABSOLUTE ERROR

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

How close a given set of measurements (observations or readings) are to their true value

A

ACCURACY

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Portion of a solution subjected to analysis

A

ALIQUOT

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Component of interest in the sample

A

ANALYTE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Extremely accurate laboratory balance created to precisely measure the mass of an object

A

ANALYTICAL BALANCE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

The science of inventing and applying the concepts, principles, and strategies for measuring the characteristics of chemical system and species

A

ANALYTICAL CHEMISTRY

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

If the reagent also meets the requirements of the American Chemical Society Committee on Analytical Reagents: Chemicals suitable for laboratory and general use.

A

ANALYTICAL REAGENT GRADE CHEMICALS

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Defined as the estimate of the systematic error: the difference between the average of measurements made on the same object and its true value

A

BIAS

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

A sample that contains all the components of the matrix except the analyte

A

BLANK

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

The process of configuring an instrument to provide a result for a sample within an acceptable range

A

CALIBRATION

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

A process for the separation of mixtures of immiscible liquids or of a liquid and a solid mixture such as a suspension

A

DECANTATION

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Sealable enclosures containing used for preserving moisture-sensitive items

A

DESICCATOR

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

The range of concentrations an instrument can read, from the minimum to the maximum detectable

A

DYNAMIC RANGE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Known data from a calibration standard and unknown data from the sample are combined to generate a quantitative report

A

EXTERNAL STANDARD METHOD

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Involves the comparison of the instrument responses from the target compounds in the sample to the responses of reference standards added to the sample or sample extract before injection

A

INTERNAL STANDARD METHOD

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Are errors other than random errors or systematic errors. They are often large and, by definition, unpredictable

A

GROSS ERRORS

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

The lowest concentration that can be measured (detected) with statistical significance by means of a given analytical procedure

A

LIMIT OF DETECTION

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

The lowest analyte concentration that can be quantitatively detected with a stated accuracy and precision

A

LIMIT OF QUANTIFICATION

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

The measurement range over which we can be confident of a good measurement within the tolerances of the standard

A

LINEAR RANGE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

A mathematical technique for fitting an equation, such as that for a straight line, to experiment data

A

LINEAR REGRESSION

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Collection of all the components in the sample

A

MATRIX

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

The sum of a group of measurements divided by the number of measurements; the average

A

MEAN

23
Q

Used to measure and dispense specific volumes of liquids

A

MEASURING PIPETTE

Mohr Pipette

24
Q

The middle value of a set of numbers

A

MEDIAN

25
Q

The curve in the upper surface of a liquid close to the surface of the container or another object, produced by surface tension

A

MENISCUS

26
Q

Detailed set of instructions for a particular analysis using a specified technique

A

METHOD

27
Q

A common laboratory instrument used to measure small amounts of liquids with a volume range between 1 and 1000µl

A

MICROPIPETTE

28
Q

The value that appears most often in a set of data values

A

MODE

29
Q

A document that contains information on the potential hazards (health, fire, reactivity and environmental) and how to work safely with the chemical product

A

MATERIAL SAFETY DATA SHEET (MSDS)

30
Q

A data point that differs significantly from other observations

A

OUTLIER

31
Q

The change in the apparent position of an object when viewed from different points

A

PARALLAX

32
Q

Refers to how close measurements of the same item are to each other

A

PRECISION

33
Q

Analytical reagent of exceptional purity that is specifically manufactured for standardizing volumetric solutions and preparing reference standards

A

PRIMARY STANDARD GRADE CHEMICALS

The National Institute of Standards and Technology is an excellent source

34
Q

Set of written instructions on how to apply a method to a particular sample

A

PROCEDURE

35
Q

Set of written guidelines for the analysis of a sample specified by an agency

A

PROTOCOL

36
Q

Arise when a system of measurement is extended to its maximum sensitivity. It is caused by uncontrollable variable

A

RANDOM ERROR

37
Q

High purity chemicals for which no established specifications exist. Are often solutions or dilution of ACS Reagent materials. Suitable for commercial, industrial, and educational application

A

REAGENT GRADE CHEMICALS

38
Q

The ratio of the absolute error of a measurement to the measurement being taken

A

RELATIVE ERROR

39
Q

Samples of about the same size that are carried through an analysis in exactly the same way.

A

REPLICATES

40
Q

Process of collecting a small amount of a material whose composition represents the bulk of the materials being sampled

A

SAMPLING

41
Q

The capacity of an analytical process to produce signals which depend almost exclusively on the target analyte(s) present in the sample.

A

SELECTIVITY

42
Q

Ability to detect very low concentrations of a given substance in a biological specimen

A

SENSITIVITY

43
Q

An experiment measurement that is proportional to the analyte concentration

A

SIGNAL

44
Q

Chemicals that have been prepared for specific applications. This includes HPLC grade and spectrophotometry grade reagents

A

SPECIAL PURPOSE REAGENT CHEMICALS

45
Q

The assay’s ability to detect the intended target

A

SPECIFICITY

46
Q

A measure of imprecision. It indicates the variability or dispersion around the mean; roughly the average distance of data from the mean

A

STANDARD DEVIATION

47
Q

Substances that are tested to be homogenous and have fixed values of its concentrations

A

STANDARD REFERENCE MATERIAL

48
Q

A consistent or proportional difference between the observed and true values of something

A

SYSTEMATIC ERROR

49
Q

Allows for you to account for only the weight of the substance being measured and not the vessel it’s being measured in

A

TARE

50
Q

Chemicals that do not have established standards for purity levels or for products with <90%

A

TECHNICAL GRADE

51
Q

Chemical or physico-chemical processes that provide the basis for analytical measurements

A

TECHNIQUES

52
Q

Disposable plastic pipets used to transfer small volumes of liquids

A

TRANSFERRING PIPETTE

53
Q

Process of verifying that a procedure yields acceptable results

A

VALIDATION

Analytical Chemistry (2 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions