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Asian-Australas J Anim Sci > Accepted Articles
DOI: https://doi.org/10.5713/ajas.18.0903    [Accepted] Published online February 7, 2019.
Combination effects of nitrite from fermented spinach and sodium nitrite on quality characteristics of cured pork loin
Tae-Kyung Kim1, Mi-Ai Lee2, Ki-Hong Jeon1, Jung-Min Sung1, Young-Boong Kim1, Yun-Sang Choi1,*
1Research Group of Food Processing, Korean Food Research Institute, Wanju 55365,Korea
2World Institute of Kimchi an Annex of Korea Food Research Institute, Gwanju 61755, Korea
Correspondence:  Yun-Sang Choi, Tel: +82-31-780-9387, Fax: +82-31-780-9059, Email: greatface@hanmail.net
Received: 3 December 2018   • Revised: 29 December 2018   • Accepted: 9 January 2019
Abstract
Objective
The purpose of this study was to investigate the effect of fermented spinach derived nitrite and sodium nitrite on cured pork loin.
Methods
The following treatments were prepared using brine (8% (w/v) salt): Control (-), no nitrite added; Control (+), 0.08% (w/v) sodium nitrite brine; T1, 0.04% (w/v) nitrite fermented spinach juice in 0.04% (w/v) sodium nitrite brine; T2, spinach juice in 0.04% (w/v) sodium nitrite brine; T3, 0.04% (w/v) nitrite fermented spinach juice used as sodium nitrite free brine; and T4, spinach juice used as sodium nitrite free brine. T2 and T4 were incubated to allow to reduce nitrate to nitrite.
Results
Spinach juice did not affect cooking loss and pH but negatively influenced flavor and overall acceptability (p<0.05). T1 samples containing synthetic and natural nitrites showed the highest redness values. Spinach juice negatively affected volatile basic nitrogen (VBN); however, thiobarbituric acid reactive substance (TBARS) values of T1 and T3 were similar to those of controls (+) (p>0.05). Residual nitrite content decreased with decreasing synthetic nitrite levels. T1 and control samples showed no significant differences in overall acceptability (p>0.05).
Conclusion
Thus, combined synthetic and natural nitrites improved the quality of cured pork loin.
Keywords: Spinach; Natural Nitrite; Synthetic Nitrite; Cured Pork Loin


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