GB/T 14455.6-2008 in English

《GB/T 14455.6-2008香料 酯值或含酯量的测定》由TC257（全国香料香精化妆品标准化技术委员会）归口，TC257SC1（全国香料香精化妆品标准化技术委员会香料香精分会）执行，主管部门为中国轻工业联合会。
ＧＢ／Ｔ１４４５５《香料通用试验方法》分为7个部分，本部分为ＧＢ／Ｔ１４４５５的第６部分。GB/T 14455的本部分规定了测定香料酯值或含酯量的方法。
本部分适用于单离及合成香料中单一酯类含酯量、精油酯值的测定。
本部分不适用于混合酯类及难以皂化的酯类的含酯量、含有内酯或较多醛类的精油酯值的测定。 本部分是对ＧＢ／Ｔ１４４５５．６―１９９３《精油　酯值的测定》、ＧＢ／Ｔ１４４５７．５―１９９３《单离及合成香料　含酯量的测定》的合并与修订。本部分与ＧＢ／Ｔ１４４５５．６―１９９３、ＧＢ／Ｔ１４４５７．５―１９９３相比，主要变化如下：
―――增加了用电位计来判断终点；
―――增加了试样制备；
―――增加了试验报告的相关内容。

Fragrance/Flavor substances - Determination of ester value or ester content

1 Scope

This part of GB/T 14455 specifies a method for the determination of the ester value or ester content of fragrance/flavor substances.

This part is applicable to the determination of the ester content of single esters and the ester value of essential oils in isolated and synthetic fragrance/flavor substances.

This part is not applicable to the determination of the ester content of mixed esters and esters that are difficult to saponify, and the ester value of essential oils containing lactones or an appreciable proportion of aldehydes.

2 Normative references

The following normative documents contain provisions which, through reference of GB/T 14455, constitute provisions of this part. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply. However parties to agreements based on this part are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document applies.

GB/T 14454.1 Fragrance/Flavor substances - Preparation of test samples (GB/T 14454.1-2008, ISO 356:1996, MOD)
GB/T 14454.14 Fragrance/Flavor substances - Preparation of standard solution, test solution and indicator solution
GB/T 14455.5 Fragrance/Flavor substances - Determination of acid value or acid content (GB/T 14455.5-2008, ISO 1242:1999, MOD)

3 Terms and definitions

For the purposes of this part of GB/T 14455, the following terms and definitions apply.

3.1
ester value
milligrams of potassium hydroxide required to neutralize the acids liberated by the hydrolysis of esters present in 1g of the fragrance/flavor substances

Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents
6 Apparatus
7 Preparation of test sample
8 Procedure
9 Expression of results
10 Test report