BS ISO 5518-2007 水果、蔬菜及其制品.苯甲酸含量的测定.分光光度法

标准号：BS ISO 5518-2007
中文标准名称：水果、蔬菜及其制品.苯甲酸含量的测定.分光光度法
英文标准名称：Fruits, vegetables and derived products - Determination of benzoic acid content - Spectrophotometric method
标准类型：X24;X26
发布日期：2007/2/28 12:00:00
实施日期：2007/2/28 12:00:00
中国标准分类号：X24;X26
国际标准分类号：67.080.01
适用范围：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.