Fruits, vegetables and derived products — Determination of benzoic acid content — Spectrophotometric method
水果、蔬菜及其衍生产品——苯甲酸含量的测定——分光光度法
发布日期:
2007-01-18
ISO 5518:2007规定了测定水果、蔬菜及其衍生产品中苯甲酸含量的方法。
由于氯苯甲酸抗氧化,该方法不能在对氯苯甲酸存在下应用,因为该酸的吸收光谱接近苯甲酸的吸收光谱。也不能在肉桂酸存在下使用,肉桂酸通过铬酸氧化转化为苯甲酸。
ISO 5518:2007 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.