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Appendix B
5/20/2009
5
3.32.
Heated Line
- Connects the reduction tube outlet to the inlet of the mixing
volume. Heated to prevent condensation of gases on tube walls.
3.33.
Holding Time -
The maximum time which samples may be held prior to
analysis and still be considered valid. (40 CFR Part 136) The time elapsed from the
time of sampling to the time of extraction or analysis, as appropriate.
3.34.
Inject Solenoid
- Solenoid used on the automated injection system to actuate
the rotation of the sample wheel.
3.35.
Injection
- Moving the ladle, containing a capsule with the sample into the
combustion furnace.
3.36.
Injector Box
- The box assembly that houses the sample wheel.
3.37.
Instrument Detection Limit (IDL)
- The minimum quantity of analyte or
the concentration equivalent which gives an analyte signal equal to three times the
standard deviation of the background signal at the selected wavelength, mass,
retention time, absorbance line, etc.
3.38.
K-Factor
- Instrument sensitivity factor in microvolts per microgram,
calibrated using an external standard.
3.39.
Laboratory Duplicates (LD1 and LD2)
- Two aliquots of the same sample
taken in the laboratory and analyzed separately with identical procedures. Analyses
of LD1 and LD2 indicate precision associated with laboratory procedures, but not
with sample collection, preservation, or storage procedures.
3.40.
Laboratory Reagent Blank (LRB)
- A matrix blank (i.e., a precombusted
filter or sediment capsule) that is treated exactly as a sample including exposure to
all glassware, equipment, solvents, and reagents that are used with other samples.
The LRB is used to determine if method analytes or other interferences are present in
the laboratory environment, the reagents, or the apparatus.
3.41.
Ladle
- Transports the capsule with the sample into a combustion furnace.
3.42.
Laboratory Control Sample (LCS) -
A sample matrix, free from the
analytes of interest, spiked with verified known amounts of analytes from a source
independent of the calibration standards or a material containing known and verified
amounts of analytes. The LCS is generally used to establish intra-laboratory or
analyst-specific precision and bias or to assess the performance of all or a portion of
the measurement system. (NELAC)
3.43.
Limit of Detection (LOD)
- The lowest concentration level that can be
determined by a single analysis and with a defined level of confidence to be
statistically different from a blank. (ACS)
3.44.
Limit of Quantitation (LOQ) -
The minimum levels, concentrations, or
quantities of a target variable (target analyte) that can be reported with a specified
degree of confidence. The LOQ is set at 3 to 10 times the LOD, depending on the
degree of confidence desired.
3.45.
Linear Dynamic Range (LDR)
- The absolute quantity over which the
instrument response to an analyte is linear. This specification is also referred to as
the Linear Calibration Range (LCR).
3.46.
Material Safety Data Sheet (MSDS)
- Written information provided by
vendors concerning a chemical’s toxicity, health hazards, physical properties, fire,
and reactivity data including storage, spill, and handling precautions.
3.47.
May -
Denotes permitted action, but not required action. (NELAC)