结果证明，导数分光光反法对痕量组分的测定是十分有效的。
It is tested that derivative spectrophotometer is very effective for determining trace components.
分离科学面临的最大挑战是复杂体系中痕量组分的分离分析。
Separation and analysis of trace components in sophisticated matrices is the most severe challenge which separation science encounters.
然而面对复杂基质样品和痕量组分样品，常常需要在分析前对样品进行预处理以达到净化和富集的目的。
But when it comes to those samples with complicate base or contain trace component, a pretreatment step will usually be imperative for purifying and enrichment.
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