18 Oct

刊登者
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当我们希望认真考虑将精油纳入我们的产品系列时,我们将样品送至独立实验室进行全面的气相色谱/质谱(GC / MS)分析,这会使我们对精油的纯度有了清晰的认知。每个GC / MS报告都包含样品特征(折射率,旋光度等)的摘要与该精油的最新公认标准(例如,从国家药典列表到最新的ISO标准)的比对。譬如, 我们的橙色分析是鉴定于ISO 3140:2011(甜橙油)。
气相色谱法测量香精油各成分的洗脱速率(通过洗涤分离物质),从而清楚地了解各个化合物的浓度(柠檬或果皮油中高柠檬烯的浓度,薰衣草中的高芳樟醇成分等)。这给于了我们一个更接近我们所期待的精油概念和使我们有机会确定可能被污染的源因。因此,我们对所有潜在的供应商始终保持一种客观的眼光。
我们要求供应商向我们提供他们自己的分析证书,以便可以根据我们的内部标准和我们自己的测试程序对其进行检查。在我们的内部实验室中,我们测试每种油的比重-相对于水的密度。对于每种类型的精油,此值可能都落在一个狭窄的范围内(在20°C下进行测量时,橙油的含量介于0.886和0.896之间),并且偏离该范围将表示可能存在掺假或污染。超出这些参数的任何精油都将被淘汰。
类似地,我们测试折射率,或通过物质光的折射角。这取决于油的成分,即使很小的差异也会在折射率范围内产生主要结果(在20°C下测量时,橙色油的R.I.介于1.456和1.461之间)。通过这种方式,我们可以跟据从第一批测试样品到最新批次的配料的质量。
13 评论
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