标准编号：ISO 5518:2007
中文名称：水果、蔬菜及其制品 苯甲酸含量的测定 分光光度法
英文名称：Fruits, vegetables and derived products — Determination of benzoic acid content — Spectrophotometric method
发布日期：2007-02
标准范围
This International Standard specifies a method for determining the benzoic acid content of fruits, vegetables and derived products.As chlorobenzoic acids are resistant to oxidation, the method cannot be applied in the presence of p-chlorobenzoic acid, as the absorption spectrum of this acid is close to that of benzoic acid. Neither can it be used in the presence of cinnamic acid, which is transformed into benzoic acid by chromic acid oxidation.NOTE The cinnamic acid determined as benzoic acid in this method exists generally only in the form of traces in vegetables, and therefore has no effect on the result obtained, except in the case of cinnamon bark, which contains higher quantities.
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