A new approach for analysing biogenic amines in meat samples: Microwave-assisted derivatisation using 2-chloro-3-nitropyridine

Abstract

Biogenic amines are compounds whose occurrence in meat is linked to the presence of undesirable microorganisms. They can be utilised as a means to assess the quality and purity of the raw material. Therefore, the methods used to determine their levels are crucial in ensuring meat safety. We propose 2-chloro-3-nitropyridine as a new reagent for microwave-assisted synthesis of biogenic amine derivatives. The obtained products were synthesised with high purity and yield and characterised using ¹H and ¹³C NMR as well as high-resolution mass spectrometry. The proposed derivatisation procedure, coupled with the HPLC method, was applied to determine the levels of biogenic amines in sirloin, ham, and chicken breast samples. Furthermore, differences in the content of the aforementioned compounds in the meat samples were analysed after storage for 24 and 72 h. The results suggest that cadaverine can be considered the primary indicator of meat changes, regardless of its type.

Keywords: 2-Chloro-3-nitropyridine; Biogenic amines; HPLC; Meat samples; Microwave-assisted synthesis.