Rapid detection method for doped cane sugar in tea

A technology of sucrose and tea, which is applied in the field of rapid detection of sucrose doped in tea, can solve the problems of direct detection interference, high professional requirements, and expensive detection costs, and achieve avoidance of heavy dependence, low requirements for specialization, and detection fast effect
CN106970073AActive Publication Date: 2017-07-21TEA RES INST CHINESE ACAD OF AGRI SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TEA RES INST CHINESE ACAD OF AGRI SCI
Publication Date
2017-07-21

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Abstract

The invention discloses a rapid detection method for doped cane sugar in tea. The rapid detection method comprises a qualitative determination process and a quantitative determination process and comprises the following main steps: sample extraction, a color development reaction and determination via spectrophotometry. According to the invention, qualitative determination is carried out in virtue of hydrolysis of cane sugar under a hydrochloric acid condition and a color development reaction of the hydrolysate fructose of cane sugar with resorcinol; a spectrophotometer is used for detecting absorbance so as to realize quantitative determination; and a mixed solution of a sample and hydrochloric acid is used as a reference solution so as to eliminate influence of pigment components in the to-be-detected sample. The rapid detection method provided by the invention realizes rapid qualitative and quantitative determination of cane sugar added in processing of tea and has the characteristics of usage of simple apparatuses, low detection cost, high sensitivity, etc.; and the method has low requirements on the professional level of an operator, avoids heavy dependence on large apparatuses and professional laboratories, can substantially improve detection efficiency, accords with the characteristic of dispersion of tea production and circulation in China and has promotion and application value in production, circulation and supervision of tea.
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Description

technical field

[0001] The invention belongs to the field of food detection, and in particular relates to a rapid detection method for sucrose doped in tea. Background technique

[0002] In recent years, sucrose has been added in the production of tea (especially black tea) from time to time. On the one hand, the sucrose added in tea processing can affect the sensory quality evaluation of finished tea in terms of aroma and color; at the same time, due to the characteristics of sucrose, which is easy to absorb moisture, deteriorate and breed bacteria, it has a greater impact on the quality and safety of tea. influences. At present, there are relatively many methods available for the detection of sugar components in food samples with simple matrices; however, for the detection of sucrose in food samples with complex matrices (such as tea, etc.), due to the complex matrix, direct detection has too much interference, and it is difficult To directly detect the sucrose content, i...

Claims

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