B36 香料、佐料作物与产品 标准查询与下载

BS ISO 4715:2001 香精油.蒸发后残留物的定量评估

The volatile fraction of the essential oil is evaporated on a boiling water bath and the residue is weighed.

Essential oils - Quantitative evaluation of residue on evaporation

BS ISO 11021:2001 香精油.水含量测定.卡尔.费休法

This International Standard specifies a method for the determination of the water content of essential oils by the Karl Fischer method.

Essential oils - Determination of water content - Karl Fischer method

BS ISO 1271:1983 香精油.羰基值的测定.游离羰氨法

The determination is carried out by converting the carbonyl compounds to oximes by reaction with free hydroxylamine liberated in a mixture of hydroxylammoniumchloride and potassium hydroxide. The excess alkali is titrated with hydrochloric acid solution, either colorimetrically or potentiometrically. The method is applicable to essential oils which contain carbonyl compounds (especially ketones, excluding methylketones) which are difficult to convert to oximes by the method specified in ISO 1279. The method is not applicable to essential oils which contain substantial amounts of esters of other alkali-sensitive constituents.

Essential oils - Determination of carbonyl value - Free hydroxylamine method

BS ISO 1279:2001 香精油.羰基值的测定.氯化羟铵电势计法

Gives two methods for the potentiometric determination of the carbonyl value of essential oils which contain carbonyl compounds. Method 1 is based on a cold oximation reaction with hydrxoylammonium chloride with exception of citronellal which need a low temperature to avoid cyclization phenomena and acetylization. Method 2 is based on a hot oximation reaction with hydroxylammonium chloride and applies to essential oils whose main constituents are ketones which are general oximable only with difficulty.

Essential oils - Determination of carbonyl value - Potentiometric methods using hydroxylammonium chloride

BS ISO 1272:2001 香精油.酚类化合物含量的测定

This International Standard specifies a method for the determination of the percentage, by volume, of phenols in essential oils. NOTE See 8.2.2 which establishes some limits to the application of this method.

Essential oils - Determination of content of phenols

BS ISO 1241:2001 香精油.乙酰化前后酯值的测定和游离醇及总醇含量的评估

Describes a method to evaluate the contents of free alcohols and total alcohols in essential oils by determination of ester values before and after acetylation by acetic anhydride in the presence of sodium acetate. Replaces the first edition.

Essential oils - Determination of ester values, before and after acetylation, and evaluation of the contents of free and total alcohols

BS ISO 14714:2001 香精油和芳族萃取物.残留苯含量测定

This International Standard describes a method for determining the residual traces of benzene in essential oils and aromatic extracts, using static headspace gas chromatography. It applies to residual contents of around 10 × 10 (10 ppm) in the analysed product.

Essential oils and aromatic extracts - Determination of residual benzene content

BS ISO 7660:2001 香精油.含有难于皂化的酯类香精油酯值的测定

The method consists in hydrolysis of the esters present in a test portion by heating in the presence of a standard volumetric solution of potassium hydroxide in dimethylsulfoxide, and back-titration of the excess potassium hydroxide with a standard volumetric solution of sulfuric acid or hydrochloric acid.

Essential oils - Determination of ester value of oils containing difficult-to-saponify esters

BS ISO 3794:2001 香精油(包括叔醇).用乙酰化后酯值的测定评估游离醇含量

The estimation is carried out by acetylation of the essential oil by acetyl chloride and acetic anhydride, in the presence of dimethylaniline. The acetylated oil is isolated and dried and the ester value is determined. The free alcohols content is calculated taking into account the ester values of the same but non-acetylated essential oil. This method is applicable to essential oils containing an appreciable proportion of tertiary alcohols, namely of linalol and terpineol. It is not applicable to essential oils containing appreciable proportions of phenols, anthranilates, lactones and aldehydes.

Essential oils (containing tertiary alcohols) - Estimation of free alcohols content by determination of ester value after acetylation

BS ISO 875:1999 香精油.乙醇中混溶度的评估

This International Standard specifies a method for the evaluation of the miscibility of essential oils with mixtures of ethanol and water of known ethanol content.

Essential oils - Evaluation of miscibility in ethanol

BS ISO 279:1998 香精油.在20℃时相对密度的测定.参比法

This International Standard specifies the reference method for the determination of the relative density of essential oils at 20 ℃. NOTE If it is necessary to perform the test at a different temperature on account of the nature of the essential oil, the temperature should be mentioned in the International Standard appropriate to the essential oil concerned. The average correction in the region of 20 ℃ is from 0,000 7 to 0,000 8 per degree Celsius.

Essential oils - Determination of relative density at 20 °C - Reference method

BS ISO 1242:1999 香精油.酸值的测定

This International Standard specifies a method of determining the acid value of essential oils. This method is not applicable to essential oils containing appreciable quantities of lactones.

Essential oils - Determination of acid value

BS ISO 1041:1973 香精油.凝固点的测定

This International Standard specifies a method of determining the freezing points of essential oils. It is not applicable in the special case of essential oil of rose.

Essential oils - Determination of freezing point

BS ISO 280:1998 香精油.折光指数的测定

This International Standard specifies a method for the determination of the refractive index of essential oils.

Essential oils - Determination of refractive index

BS ISO 592:1998 香精油.旋光度的测定

This International Standard specifies a method for determining the optical rotation of essential oils. When dealing with solid oils, partially solid oils, oils that are highly viscous at room temperature, or highly coloured oils, this determination is carried out on a solution of the oil.

Essential oils - Determination of optical rotation

BS ISO 1242:2001 香精油.酸值的测定

This International Standard specifies a method of determining the acid value of essential oils. This method is not applicable to essential oils containing appreciable quantities of lactones.

Essential oils - Determination of acid value

BS ISO 592:2001 香精油.旋光度的测定

Essential oils - Determination of optical rotation

BS ISO 875:2001 香精油.乙醇中混溶度的评估

Essential oils - Evaluation of miscibility in ethanol

BS ISO 1041:2001 香精油.凝固点的测定

The determination consists in slow and progressive cooling of the essential oil and observation of the variations in temperature as the oil passes from the liquid to the solid state. The apparatur for determination of freezing point consists of a wide-mouthed container of about 500 ml capacity, provided with a bored cork or rubber stopper into which a stout-walled test tube is inserted. Another smaller test tube is fitted into the stout-walled test tube by means of another bored cork or rubber stopper. Into the smaller test tube a thermometer is inserted.

Essential oils - Determination of freezing point

BS ISO 279:2001 香精油.在20℃时相对密度的测定.参比法

This International Standard specifies the reference method for the determination of the relative density of essential oils at 20 ℃. NOTE If it is necessary to perform the test at a different temperature on account of the nature of the essential oil, the temperature should be mentioned in the International Standard appropriate to the essential oil concerned. The average correction in the region of 20 ℃ is from 0,000 7 to 0,000 8 per degree Celsius.

Essential oils - Determination of relative density at 20 °C - Reference method