Collaborative Study of Crude Protein in Feeds Using the Kjeldahl Method

A collaborative study evaluated crude protein content in four feed samples across seven laboratories. Each laboratory analyzed samples over six days with three replicates per sample per day. The study found significant variation among laboratories, which accounted for 43.6% to 68.2% of the total random variation.

Use Cases

• Assessing inter-laboratory reproducibility of the Kjeldahl method based on reported variance components
• Analyzing bias in nitrogen recovery from standard compounds based on the 25% of observations with significant bias
• Modeling the effect of analysis day and material-laboratory interaction on protein estimates based on the reported significant factors

Strengths

• Data originates from a structured collaborative study involving seven laboratories
• Analysis includes four distinct feed materials and four nitrogen standard compounds
• Experimental design includes three replicates per sample per day over six days of analysis

Limitations

• Row count and specific column-level documentation are absent; field semantics must be inferred after download
• Last update date is unknown; freshness unverified

Provenance

Source

Marjorrie Augusto de Souza via paperswithcode

Collection Method

Collaborative laboratory study evaluating the Kjeldahl method for crude protein measurement.

Geography

Laboratories linked to the National Institute of Science and Technology in Animal Science (INCT-CA)