Determining Total Nitrogen in Kjeldahl Digestion Solution
Author Information
Author(s): J. W. Geiger, N. M. Davis, W. S. Blakemore, C. L. Long
Primary Institution: Baptist Medical Center Princeton
Hypothesis
A rapid method for determining total nitrogen in urine and stool samples would improve the evaluation of protein needs in hospitalized patients.
Conclusion
The adapted colorimetric ammonia methodology provides a more accurate assessment of protein status by measuring total nitrogen in both urine and stool samples.
Supporting Evidence
- The adapted method allows for rapid analysis of nitrogen in small sample volumes.
- The study demonstrated that using total nitrogen from both urine and stool provides a better estimate of protein needs.
- Precision and reproducibility of the method were established through multiple determinations.
Takeaway
This study created a faster way to measure nitrogen in urine and stool, which helps doctors understand how much protein patients need.
Methodology
The study adapted a colorimetric ammonia methodology to a centrifugal analyser for rapid nitrogen analysis in urine and stool samples.
Limitations
The method requires expensive equipment and may have technical issues with solid-sample analysis.
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