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Assessing Total Nitrogen in Surface-Water Samples?Precision and Bias of Analytical and Computational Methods
Assessing Total Nitrogen in Surface-Water Samples?Precision and Bias of Analytical and Computational Methods
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The characterization of total-nitrogen (TN) concentrations is an important component of many surface-waterquality programs. However, three widely used methods for the determination of total nitrogen-(1) derived from the alkaline-persulfate digestion of whole-water samples (TN-A); (2) calculated as the sum of total Kjeldahl nitrogen and dissolved nitrate plus nitrite (TN-K); and (3) calculated as the sum of dissolved nitrogen and particulate nitrogen (TN-C)- all include inherent limitations. A d…

Assessing Total Nitrogen in Surface-Water Samples?Precision and Bias of Analytical and Computational Methods (el. knyga) (skaityta knyga) | knygos.lt

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The characterization of total-nitrogen (TN) concentrations is an important component of many surface-waterquality programs. However, three widely used methods for the determination of total nitrogen-(1) derived from the alkaline-persulfate digestion of whole-water samples (TN-A); (2) calculated as the sum of total Kjeldahl nitrogen and dissolved nitrate plus nitrite (TN-K); and (3) calculated as the sum of dissolved nitrogen and particulate nitrogen (TN-C)- all include inherent limitations. A digestion process is intended to convert multiple species of nitrogen that are present in the sample into one measureable species, but this process may introduce bias.

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The characterization of total-nitrogen (TN) concentrations is an important component of many surface-waterquality programs. However, three widely used methods for the determination of total nitrogen-(1) derived from the alkaline-persulfate digestion of whole-water samples (TN-A); (2) calculated as the sum of total Kjeldahl nitrogen and dissolved nitrate plus nitrite (TN-K); and (3) calculated as the sum of dissolved nitrogen and particulate nitrogen (TN-C)- all include inherent limitations. A digestion process is intended to convert multiple species of nitrogen that are present in the sample into one measureable species, but this process may introduce bias.

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