STUDY ON DECREASE OF NITRITE AND NITRATE USAGE IN PROCESSED MEAT WITH ADDITION OF NATURAL SALT AND CARBON MONOXIDE


https://doi.org/10.21323/2414-438X-2017-2-4-35-43

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Abstract

This study was carried out to examine the reddening of meat products due to the addition of natural yellow salt (YS) and carbon monoxide (CO). Following YS or NaCl addition at 2% to pork subsequent to nitrite (0~100 ppm) treatment, color development due to this addition was analyzed optically. Heme pigment content in the meat was also determined spectrophotometrically. YS was found to bring about greater reddening than NaCl, indicating residual nitrite and nitrate content to be significantly higher in meat containing YS, through the amount of either was quite small. The nitrite itself in YS could never explain the color formation by the YS. Because the YS included not only nitrite but also nitrate, the effects of nitrate on the color stability of cooked cured pork were examined. Nitrate inhibited the nitrite decrement and discoloration in the cooked cured ham. The degradation rate of nitrite was clearly found to decrease with nitric acid content. Nitrate does not appear to serve as a donor of nitrite, but rather inhibits nitrite reduction in cooked meat products, with consequent prolongation of color stability. Nitrate, observed in many rock salt and also in this case, could enhance the color formation. CO treatment of pork caused the formation of carboxy myoglobin (COMb) with consequent reddening of the meat. COMb was shown to be heat-stable and form stably at pH 5.0 to 8.0 and to be extractable with water, but was barely extractable at all with acetone. Nitric oxide was found to have greater affinity toward myoglobin (Mb) than CO. Nitrosyl Mb was noted to be stable in all meat products examined. CO was seen to be capable of controlling the extent of lipid oxidation.


About the Authors

R. Sakata
School of Veterinary Medicine, Azabu University
Japan


S. Takeda
School of Veterinary Medicine, Azabu University
Japan


M. Waga
School of Veterinary Medicine, Azabu University; Itoham Foods
Japan


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Supplementary files

For citation: Sakata R., Takeda S., Waga M. STUDY ON DECREASE OF NITRITE AND NITRATE USAGE IN PROCESSED MEAT WITH ADDITION OF NATURAL SALT AND CARBON MONOXIDE. Theory and practice of meat processing. 2017;2(4):35-43. https://doi.org/10.21323/2414-438X-2017-2-4-35-43

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