The content of selected minerals determined in the liver, kidney and meat of pigs
Stasiak K., Roślewska A., Stanek M., Cygan-Szczegielniak D., Janicki B.
The aim of the study was to determine the chemical composition of pig meat, liver and kidney in terms of mineral elements, and to establish the relationships between selected macro- and microelements. Twenty organically raised pigs [Złotnicka Spotted and F1 (Polish Large White ´ Polish Landrace)] were investigated. At the end of fattening (100-108 kg of body weight), the animals were slaughtered and the following tissues and organs were sampled from each pig: muscle longissimus lumborum, liver, and kidney. The samples were freeze-dried and digested in an Ethos Plus microwave system. Mineral content of the prepared samples was determined by means of a Unicam Solar 969 atomic absorption spectrometer. Longissimus lumborum muscle proved to be rich in macroelements as 1 kg of fresh tissue was found to contain as much as 282.34 mg magnesium, 3 668.41 mg potassium and 329.35 sodium. Among the analysed microelements (Zn, Cu, Mn and Fe), the presence of only zinc and iron (16.13 and 0,02 mg kg-1 of fresh tissue, respectively) was detected in the muscles. Liver samples were characterised by the highest levels of Zn (64.09 mg kg-1), Mn (3.37 mg kg-1) and Fe (0,48 mg kg-1). The mean content of Cu in 1 kg of fresh tissue did not exceed 7.42 mg. The macroelements determined were Mg (180.89 mg kg-1), K (3 082.04 mg kg-1) and Na (744.25 mg kg-1). Kidneys were most abundant in Cu (9.52 mg kg-1) and Na (1 404.08 mg kg-1). In addition, they also contained zinc (24.62 mg kg-1), manganese (2.25 mg kg-1), iron (0.11 mg kg-1), magnesium (202.14 mg kg-1) and potassium (2 541.63 mg kg-1).
Stasiak K., Roślewska A., Stanek M., Cygan-Szczegielniak D., Janicki B. 2017. The content of selected minerals determined in the liver, kidney and meat of pigs. J. Elem., 22(4): 1475 - 1483. DOI: 10.5601/jelem.2017.22.1.1314
minerals, pig, liver, kidneys, muscles