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WW Lab Analyst
Terms in this set (37)
measure of accuracy that is calculated as the difference between an observed or measured value and a true value.
1: taking up of matter in bulk by other matter, as in dissolving of a gas by a liquid.
2: Penetration of substances into the bulk of the solid or liquid.
The absolute nearness to the truth. In physical measurements, it is the degree of agreement between the quantity measured and the actual quantity. It should not be confused with "precision," which denotes the reproducibility of the measurement.
1: a substance that tends to lose a proton
2: a substance that dissolves in water with the formation of hydrogen ions.
3: a substance containing hydrogen which may be replaced by metals to form salts
the quantitative capacity of aqueous solutions to neutralize a base: measured by titration with a standard solution of a base to a specified endpoint: usually expressed as milligrams of equivalent calcium carbonate per liter (mg/L CaCO3); not to be confused with pH. Water does not have to have a low pH to have high acidity.
the adherence of a gas, liquid, or dissolved material to the surface of a solid or liquid. It should not be confused with absorption.
requiring, or not destroyed by, the presence of free or dissolved oxygen in an aqueous environment
A gelatinous substance extracted from a red algae, commonly used as a medium for laboratory cultivation of bacteria.
coalescence of dispersed suspended matter into larger flocs or particles
the amount of sample used for analysis
the condition of water, wastewater, or soil that contains a sufficient amount of alkali substances to raise the pH above 7.0
the capacity of water to neutralize acids; a property imparted by carbonates, bicarbonates, hydroxides, and occasionally borates, silicates, and phosphates. It is expressed in milligrams of equivalent calcium carbonate per liter (mg/L) CaCO3).
1: a condition in which free and dissolved oxygen is unavailable
2: requiring or not destroyed by the absence of air or free oxygen
1: separation of a compound into its constituent parts
2: the breaking down of a complex substance into simpler substances (quantitative analysis is the determination of the proportions of the constituents)
compound determined by an analysis
mechanical or electronic balance having a sensitivity of at least 0.1 mg
dry or devoid of water
the sum of a set of observations divided by the number of observations
the nonvolatile inorganic solids that remain after incineration
to absorb and incorporate as part of the cell.
atomic absorption spectrophotometry
a highly sensitive instrumental technique for measuring trace quantities of elements in water
1: weight of an element relative to carbon
2: the weight given in the periodic table
organisms including nitrifying bacteria and algae that use carbon dioxide as a source of carbon for cell synthesis. They can consume dissolved nitrates and ammonium salts.
alkaline; solution containing hydroxyl ions (OH) and having a pH greater than 7.0
states that, as the concentration of light-absorbing species increases, the absorption of light will increase proportionately
consistent deviation of measured values from the value caused by systematic errors in the procedure
acid salt of carbonic acid containing the radical HCO3-; component of total alkalinity
uptake and retention of substances by an organism from its surrounding environment and food
1: an assay method using a change in biological activity as a qualitative or quantitative means of analyzing a material's response to biological treatment
2: a method of determining the toxic effects of industrial wastes and other wastewaters by using viable organisms; exposure of fish to various levels of chemical under controlled conditions to determine safe and toxic levels of that chemical.
Biochemical Oxygen Demand (BOD)
Amount of oxygen required by aquatic bacteria to decompose given load of organic waste; a measure of water pollution.
total amount of living tissue within a given trophic level
plants (flora) and animals (fauna) living within a system
solution used in cultivation of microorganisms
compound that resists sharp, sudden changes in pH
a glass tube with fine gradations and a bottom stopcock used to measure and dispense fluids accurately
Carbonaceous Biochemical Oxygen Demand (CBOD)
A quantitative measure of the amount of dissolved oxygen required for the biological oxidation of carbon-containing compounds in a sample
chain of custody
document designed to trace the custody of a sample(s) from the point of origin to final disposition, with the intent of legally proving that custody remained intact and that tampering or substitutions were precluded
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