Hojjatie - AAPFCO
Hojjatie - AAPFCO
Hojjatie - AAPFCO
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Current Methods Available for Biuret Analyses<br />
<br />
AOAC 960.04 (1980) for biuret in urea<br />
Tartrate salt (NaKC 4 H 4 O 6 .4H 2 O), copper sulfate, biuret standard,<br />
spectrophotometer.<br />
<br />
<br />
<br />
AOAC 976.01 (1980) for biuret in fertilizers<br />
Based on copper complex and determination by AAs in<br />
combination with AOAC 960.04.<br />
Biuret determination by ion exchange chromatography and<br />
ninhydrin (J. Anim.Sci, 1967)<br />
Amino acid analyzer, sulfonated styrene resin, ninhydrin.<br />
UV-vis determination of biuret in hydroquinone-ureacontaining<br />
fertilizers (Nut. Cycl. In Agrosys., 1963)<br />
Based on copper colorimetric method.<br />
HPLC Method (Anal.Chem, 1982)<br />
Reversed phase HPLC in combination with copper compelexation.
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