| gas chromatography |
Gas chromatography (GC) is a method of measuring the volatile chemical constituents of a substance. It is one of four objective tests that Frontier uses to determine the quality, identity and purity of every essential oil. GC analysis produces a "fingerprint" of the oil by showing the quantitative presence of each chemical compound. ...
출처: www.frontiercoop.com/learn/glossary.html
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