Use of polarography as a quality-control method for determining diacetyl in citrus and vegetable juices, yoghurt and butter.

摘要: The determination of diacetyl permits the detection microbial growth in processing citrus fruit before appearance other organoleptic, chemical or microbiological changes. It also makes it possible to detect a break cold chain during distribution and sale. study proposed polarographic method for that allowed routine analysis with aim detecting contamination juice manufacturing (orange orange-carrot). analytical performance terms linearity from 0 960 μg ml-1, recovery 97 98%, precision 3.2 4.8%, sensitivity 0.2 ng ml-1 juices indicated robustness method. same was applied butter yoghurt limits 0.4 g-1.