ACHEM Chemical Analysis Flashcards
Involves the application of methods and techniques to obtain specific objective quantitatively and qualitatively including the structural information on the nature of matter.
Analytical Chemistry
Involves the application of methods and techniques to obtain specific objective quantitatively and qualitatively including the structural information on the nature of matter.
Analytical Chemistry
Also known as wet chemical analysis which uses purely chemicals
Classical Techniques
Measures the contamination in terms of shipping and laboratory sources
Trip blank
The standard in this method became regulatory
Regulatory method
Systematic procedure to achieve specific objectives using specified techniques
Method
Have the highest metrologicql qualities whose operation can be described and understood instantly
Primary Method
Measures the contamination in laboratories sources
Method or Instrument blank
Set of written instructions on how to apply method in a particular sample
Procedure
E method to measure or determine chemical of physical properties of an element, mixture or substance
Analytical Techniques
Set of guidelines for analysis specifically created by a company
Protocol
Use to analyse large number of samples in short period of time to identify samples that give too (+) result
Screening
Graphite Furnace Atomic Absorption Spectro is an example of
Tech, meth, procedures or protocol
Techniques
Signal is either for analyte, matrix, or blank and have the lowest concentration of noise (analyte) in test sample that is distinguished from zero
Limit of Detection
Same of lod but with reasonable precision and accuracy
Limit of quantification
In most instrumental method, it is applied only when it is possible to determine the BASELINE NOISES obtained from BLANK DETERMINATION
Noise ratio or Based on numerical value of signal
A sample that contain all the components except analyte
Blank
It is an indication of reproducibility or a measurement
Precision
Chemical analysis qre affected by these types of errors
Gross, systematic and random errors
The focus of interest in the sample or the one being analyze
Analyte
They are often large and may cause a result to be either high or low
Gross errors
To improve the reliability and to obtain information about the variability of the results, sample, ______ is carried through an analytical procedures
Replicates
Causes the mean of a set of data to differ from the accepted value
Systematic or determinate error
We just get a portion of a sample or ____ to be subjected on the analysis
Aliqout
Measure of the agreement between an experimental result and qn expected or true value
Accuracy
An experimental measurement that is proportional to analyte concentration
Signal
A process of collecting small amount of material whose composition represent the bulk of the material being analysed
Sampling
Components of the sample other than the analyte
Matrix
Casues data to be more scattered or less symmetrically around the mean
Random error or interminate
False positive should be ___ than false positive
Less
______ is a statistical tool used to test and decide whether the result should be accepted or rejected
Q test
______ is a statistical tool used to test and decide whether the result should be accepted or rejected
Q test
Probability that the true mean lies within the certain interval
Confidence level
Another test method in deciding for rejecting or accepting values suggested by ISO and American Society for testing and materials
Grubbs test
Range values within which the true mean is expected to lie with a certain probability
Confidence interval
Probability that the result is outside the confidence interval
Significance level
Boundaries of the confidence interval
Confidence limit
Systematic error affect ________.
Accuracy
Gross error or blunder can be eliminated or corrected and often leads to ________.
Outliers
Do Random error or indeterminate can be determined??
No because they are always present
Gross or blunder affects Accuracy yes or no.
Yes
Random error or indeterminate cannot be eliminated or corrected but can be minimized by increasing the number of measurements. True or false
True
The results in Systematic errror or determinate are reproducible because results are usually inconsistent in both magnitude and direction
Consistend false
The results are reproducible in random error
No 50/50 of being + or -
Using the wrong reagent or instrument is an example of
Gross error or blunder
A pipette that consistently deliversbthe wrong volume is an example of
Systematic error
Using the pipette in a wrong position during the measurement is an example of
Random error
If the Q is greater than Q crit,
Reject
If G is greater than G crit
Reject
If Q crit is greater then Q
Retain
Non-negative parameter characterizing the dispersion of the quantity values being attributed to a measurand, based on the information used
Measurement uncertainty
Process by which a sample population is reduced in size to an amount of homogeneous material that can be conveniently handled in the lab in which the composition is representative
Sampling
During acid spills, which of the following can be applied to the spill before treating it with adsorbents chemical
Na2CO3
These are any waste materials that can be retrieved from the waste stream and free from contamination that ste materials that can be suitable beneficial use
Recyclable Waste
