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首页> 外文期刊>International Dairy Journal >Variation of indoxyl and cresol sulphates in milk protein commodities
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Variation of indoxyl and cresol sulphates in milk protein commodities

机译：乳蛋白商品中吲哚酚和甲酚硫酸盐的变化

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摘要

Indoxyl and cresol sulphates were determined in retail milk products and milk protein commodities. Indoxyl sulphate (IXS) and p-cresol sulphate/m-cresol sulphate (PCS/MCS) varied widely among the milk proteins (IXS: 0.93), with PCS/MCS, on average, 11.3 +/- 3.3 (n = 15) times IXS. IXS and PCS/MCS decreased with protein enrichment (from 57 to 83% protein) in a milk protein concentrate, indicating removal by the ultrafiltration process. In addition, the lowest IXS and PCS/MCS levels were found in the ultrafiltered commodities: milk protein concentrates, milk protein isolates, and whey protein concentrates. These data were consistent with the reduction of IXS and PCS/MCS in fat free milk by bench scale ultrafiltration. The distribution of cresol sulphates was approximated as 70% para-, 30% meta-, and <5% ortho-cresol sulphates.
机译：在零售奶制品和奶蛋白商品中测定了吲哚酚和甲酚硫酸盐。乳蛋白中的吲哚硫酸盐（IXS）和对甲酚硫酸盐/间甲酚硫酸盐（PCS / MCS）差异很大（IXS：0.93），其中PCS / MCS平均为11.3 +/- 3.3（n = 15）倍IXS。 IXS和PCS / MCS随牛奶浓缩蛋白中的蛋白质富集（从57％减少到83％）而降低，表明已通过超滤过程去除。此外，在超滤产品中发现了最低的IXS和PCS / MCS水平：乳蛋白浓缩物，乳蛋白分离物和乳清蛋白浓缩物。这些数据与通过台式超滤技术在无脂牛奶中IXS和PCS / MCS的减少相一致。甲酚硫酸盐的分布约为70％的对-甲磺酸，30％的间甲磺酸和<5％的邻甲酚硫酸盐。

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