Essence and fragrance detection

The first method in this part of GB/T 14454 specifies the use of hydroxylamine hydrochloride method to determine the carbon value of essential oils and the content of monomers and synthetic fragrances! Method for determining the content of base compounds. The method of using hydroxylamine hydrochloride cold oximation in this method is applicable to perfumes whose main components are easily oximated aldehydes or ketones (excluding citronellal, which requires low temperature to avoid cyclization and acetalization phenomena); The method of thermal oximation with hydroxylamine hydrochloride is suitable for perfumes whose main components are ketones that are generally difficult to oximate. Note 1: The free hydroxylamine method is used to determine the essential oil containing citronellal. See the second method. Note 2: Essential oils containing easily masked aldehydes or ketones include lemon grass oil, citrus fruit oil, and kidney oil. Note 3: Essential oils containing methyl ketones that are difficult to oximate include fragrant root oil, sage oil, artemisia oil, etc. The second method in this part of GB/T 14454 specifies the method for determining the carbon value of essential oils and the content of amino compounds in isolated and synthetic fragrances using the free hydroxylamine method. This method is applicable to perfumes containing base compounds (especially ketones, except methyl ketones) that are not easily converted into oxime compounds using the method specified in the first method, and is not applicable to perfumes containing large amounts of esters or alkali sensitive components. The third method in this part of GB/T 14454 specifies the use of neutral sodium sulfite method for the determination of spices! The method for determining the content of aromatic compounds in aldehydes and certain ketone flavorings is applicable. Which method of this section will be specified in the standards for spice products. 2 Normative references: The clauses in the following documents become the clauses of this part through the reference of GB/T 14454. For dated references, all subsequent amendments (excluding corrected content) or revisions are not applicable to this section. However, it is encouraged for all parties who have reached agreements under this section to study whether the latest versions of these documents can be used. For undated references, the latest version applies to this section. GB/T14454.1 Preparation of Spice Samples (GB/T 14454.1-2008, ISO 356; 1996, MOD) GB/T14454.14 Preparation of Spice Standard Solutions, Test Solutions, and Indicator Solutions

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