Suitability of bronopol preservative treated milk for fatty acid determination
Suitability of bronopol preservative treated milk for fatty acid determination
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DOI：
10.1017/s0022029911000082
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发表时间：
2011-05-01
影响因子：
2.1
通讯作者：
Stergiadis, Sokratis
中科院分区：
文献类型：
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作者：
Butler, Gillian;Stergiadis, Sokratis
本工作旨在测试溴硝丙二醇保存的牛奶是否可以可靠地用于脂肪酸测定。乳制品生产和牛奶质量经常受到定期监测，以评估性能并有助于选择指数。有证据表明，脂肪组成可以通过选择性育种的影响，可能有兴趣使用在常规测试中收集的样本，以评估个体奶牛脂肪酸谱，有助于育种指数。然而，大多数记录服务使用防腐剂，如溴硝丙二醇，如果这影响随后的脂肪酸分析，则没有公布的记录。本研究使用来自油籽补充试验的牛奶，产生广泛的牛奶脂肪酸谱，以测试通过GC测定的31种脂肪酸的浓度是否受到溴硝丙二醇的影响。如果保存的样品随后被冷冻，则在大多数情况下，用溴硝丙二醇处理的牛奶可以可靠地用于评估脂肪酸组成;然而，溴硝丙二醇可能会影响相对低浓度的一些长链脂肪酸。这是简化牛奶成分分析的一小步，但它最终可以简化将牛奶脂肪质量纳入育种指标的过程，无论是为了“更健康”的牛奶，还是潜在地减少甲烷排放和乳制品生产对环境的影响。
This work aimed to test if milk preserved with bronopol can be reliably used for fatty acid determination. Dairy production and milk quality are often monitored regularly to assess performance and contribute to selection indices. With evidence that fat composition can be influenced by selective breeding, there might be an interest in using samples collected in routine testing to evaluate individual cow fatty acid profiles, contributing to breeding indices. However, most recording services use a preservative such as bronopol and there is no published record if this influences subsequent fatty acid analysis. This study used milk from an oil seed supplementation trial, generating a wide range of milk fatty acid profiles, to test if the concentration of 31 individual fatty acids determined by GC were influenced by bronopol. Provided preserved samples are subsequently frozen, milk treated with bronopol can reliably be used to evaluate fatty acid composition in most cases; however bronopol might influence a few long-chain fatty acids present in relatively low concentrations. This is one small step towards simplifying milk compositional analysis but it could ultimately streamline the inclusion of milk fat quality into breeding indices, either with a view to 'healthier' milk or potentially reducing methane output and the environmental impact of dairy production.