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Construction method and application of electrochemical fingerprint of tea

A technology of fingerprints and construction methods, applied in the direction of material electrochemical variables, etc., can solve problems such as difficulties in tea identification, affecting the reputation of famous teas, and individual deviations in review results

Inactive Publication Date: 2016-04-27
ZHEJIANG SHUREN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Tea has always used "sensory evaluation" as the main method of its quality evaluation. Due to the influence of unstable factors such as the evaluation environment, evaluation equipment, and reviewer's work experience, it will inevitably lead to large individual deviations in the evaluation results.
Manual identification of tea types often depends on some characteristics of the tea itself, but not everyone has the ability to identify good or bad tea by its appearance, and tea from different origins can also be improved to make their appearance basically the same through the improvement of the frying process , thus making it difficult to identify tea
People often buy bad-quality or false-named teas due to lack of tea knowledge or little knowledge, which not only causes economic losses to consumers, affects the reputation of famous teas, but also endangers their health.

Method used

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  • Construction method and application of electrochemical fingerprint of tea
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  • Construction method and application of electrochemical fingerprint of tea

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1 Preparation of electrochemical fingerprint of Qiandaowan brand Anji white tea

[0023] Put 0.8000g dried Qiandaowan brand Anji white tea powder crushed to 40 meshes into the reactor, and add a certain amount of H 2 SO 4 , MnSO 4 and 1mLCH 3 COCH 3 , control the concentration of hydrogen ions in the reactor to 1.500mol / L, the concentration of manganese sulfate to 0.007000mol / L, stir at a constant temperature of 37°C for 10min, and then add a certain amount of KBrO 3 , the control potassium bromate concentration is 0.06800mol / L. KBrO 3 The timing starts when the first drop is added, the 217 saturated calomel electrode is used as a reference, and the 213-type platinum electrode is used as an indicator electrode. Use an electrochemical workstation to record the change of the potential (E) in the electrochemical oscillation system with time (t), and draw E-t curve to construct its electrochemical fingerprint.

[0024] Reproducibility test: Take 3 copies o...

Embodiment 2

[0025] Example 2 Preparation of Electrochemical Fingerprint of Tiantai Mountain Tourmaline Tea

[0026] Put 0.9000g of dried Tiantai Mountain tourmaline tea powder crushed to 40 mesh into the reactor, and add a certain amount of H in order to keep the total reaction volume at 100mL 2 SO 4 , MnSO 4 and 1mLCH 3 COCH 3 , control the concentration of hydrogen ions in the reactor to 1.400mol / L, the concentration of manganese sulfate to 0.008000mol / L, stir at a constant temperature of 36°C for 10min, and then add a certain amount of KBrO 3 , the control potassium bromate concentration is 0.07000mol / L. KBrO 3 The timing starts when the first drop is added, the 217 saturated calomel electrode is used as a reference, and the 213-type platinum electrode is used as an indicator electrode. Use an electrochemical workstation to record the change of the potential (E) in the electrochemical oscillation system with time (t), and draw E-t curve to construct its electrochemical fingerprin...

Embodiment 3

[0028] Example 3 Preparation of Electrochemical Fingerprint of Dongping Brand High Mountain Tea

[0029] Put 1.0000g dry Dongping high mountain tea powder crushed to 40 meshes into the reactor, and add a certain amount of H in order to keep the total reaction volume at 100mL. 2 SO 4 , MnSO 4 and 1mLCH 3 COCH 3 , control the concentration of hydrogen ions in the reactor to 1.600mol / L, the concentration of manganese sulfate to 0.006000mol / L, stir at a constant temperature of 39°C for 10min, and then add a certain amount of KBrO 3 , the control potassium bromate concentration is 0.07800mol / L. KBrO 3 The timing starts when the first drop is added, the 217 saturated calomel electrode is used as a reference, and the 213-type platinum electrode is used as an indicator electrode. Use an electrochemical workstation to record the change of the potential (E) in the electrochemical oscillation system with time (t), and draw E-t curve to construct its electrochemical fingerprint.

...

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Abstract

The invention discloses a construction method for electrochemical fingerprint of tea. The method constructs the electrochemical fingerprint of tea by using an electrochemical work station in virtue of chemical oscillation technology. The construction method is characterized in that tea crushed to a certain particle size is used as a raw material; on the premise that the bulk volume of a reaction is 100 mL, certain amounts of H2SO4 and MnSO4 and 1 mL of CH3COCH3 are successively added and isothermal stirring is carried out at a certain temperature for 10 min; then a certain amount of KBrO3 is added; the time when the first drop of KBrO3 is added is taken as starting time, and the electrochemical work station is used for recording the electrochemical fingerprint of the tea. Through comparison of similarity of electrochemical fingerprint of tea, tea from different producing areas and of different varieties can be discriminated.

Description

technical field [0001] The invention relates to a method for constructing electrochemical fingerprints of tea leaves. Background technique [0002] Tea is a traditional healthy drink in my country and one of the three major non-alcoholic beverages in the world. It is known as "21st Century Beverage". Tea contains a variety of nutrients, such as tea tannins, tea elements, aromatic oils, proteins, vitamins, pigments, pectin, enzymes and minerals, etc., and produces excitement, intelligence, digestion, greasy relief, and thirst quenching for people. , diuresis, eliminate fatigue, lower blood fat, lower blood pressure, lower cholesterol, lose weight, increase anti-radiation, anti-cancer, anti-aging, etc. It is one of the recognized health foods because it is rich in dozens of minerals needed by the human body and Rich in vitamins, it has many functions such as dispelling stagnation qi, driving sleep qi, nourishing qi, eliminating disease qi, etc., and it is of high quality and ...

Claims

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Application Information

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IPC IPC(8): G01N27/26
CPCG01N27/26
Inventor 金建忠孙娜波李玲玲许杭诗王林芳
Owner ZHEJIANG SHUREN UNIV
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