Parameter detection of low alcohol Luzhou flavor Baijiu

1 Scope This standard specifies the general principles, basic requirements and detailed analysis steps of Baijiu analysis. This standard is applicable to the analysis of various flavor Baijiu. 2 Normative References: The clauses in the following documents become the clauses of this standard through the reference surface of this standard. For dated reference documents, all subsequent amendments (excluding corrected content) or revisions are not applicable to this standard. Therefore, parties to agreements based on this standard are encouraged to study whether the latest versions of these documents can be used. For undated references, the latest version applies to this standard. GB/T 601 Chemical Reagents - Preparation of Standard Titration Solutions GB/T 603 Chemical Reagents: Preparation of Preparations and Products Used in Test Methods (GB/T 603-2002, ISO 6353-11982, NEQ) GB/T 6682-1992 Specification and Test Methods for Analytical Laboratory Water (NEQ ISO 36961987) 3 General 3.1 The terminology and units of measurement used in this standard shall comply with the relevant national standards. 3.2 The analytical balance, acidity meter, spectrophotometer, and gas chromatograph used in this standard must be calibrated on time; The alcohol meters, thermometers, micro injectors, pipettes, burettes, volumetric flasks, and other glass measuring instruments used should be calibrated in accordance with relevant verification regulations. The term "instrument" in this standard is a necessary instrument for analysis, and general laboratory instruments are no longer included. 3.4: When no other requirements are specified, the water used in this standard should comply with the specifications for Grade III or higher water in GB/T 6682-1992. When no other specifications are specified, the reagents used refer to analytical reagent (AR). Unless otherwise specified, the term "solution" in this standard refers to an aqueous solution diluted to the mark, which refers to a constant volume with water. 3.6 When there are two or more analytical methods for the same test item, each laboratory can choose according to their own conditions, but the first method is the arbitration method. 4 Basic requirement 4.1 The sample should be tested in parallel. Reporting the analysis results based on measured data does not require conversion based on alcohol content, and the significant digits should be consistent with technical requirements. Glassware used in 4.2 analysis should be soaked in chromic acid washing solution before use, rinsed with tap water, and then washed clean with distilled water. When measuring metal ions (such as lead and manganese), soak them in 15% nitric acid and rinse them directly with deionized water. The significant number in 4.3 analysis method represents the precision required for absorption or weighing. 4.4 Constant weight refers to the difference between the two weighing values of the sample after drying, which is less than 2 mg. During chromatographic analysis, the micro injector should be cleaned thoroughly. Usually, before and after use, ether is used to extract and wash 50 to 100 times. During continuous injection, the wine sample can also be directly drawn and washed clean

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