Method for reducing content of heavy metal ions such as arsenic and lead in instant tea

A technology of heavy metal ions and instant tea, which is applied in the direction of tea extraction, etc., can solve the problems of excessive heavy metals and high levels of heavy metals, and achieve the effects of improving safety, easy operation, and obvious heavy metal removal effect

Active Publication Date: 2015-05-27
DAMIN FOODSTUFF ZHANGZHOU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for reducing the content of heavy metal ions such as arsenic and lead in instant tea, which is used to solve the problem of high or excessive heavy metals in existing instant tea, improve the safety of instant tea, and improve the quality of instant tea products. market competitiveness

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A method for reducing the content of heavy metal ions such as arsenic and lead in instant tea, comprising the following steps:

[0019] ① Extracting, centrifuging, filtering, and concentrating the Pu'er tea to prepare a Pu'er tea concentrate with a mass concentration of 10%;

[0020] ② Pass the Puer tea concentrate obtained in the above step ① through a resin column filled with LX-8 macroporous adsorption resin at room temperature, the volume ratio of the Puer tea concentrate to the macroporous adsorption resin is 30:1, adjust the resin The flow rate of the permeate after adsorption is 2BV / h, collect the column solution A, and then use 40% edible alcohol as the eluent to elute the tea polyphenols adsorbed on the LX-8 macroporous adsorption column, adjust The flow rate of the eluate is 3BV / h. When the elution volume is 6BV, the elution is stopped, the eluate is collected, and the eluate is subjected to vacuum rotary evaporation to obtain Pu-erh tea liquid B, and the alco...

Embodiment 2

[0027] A method for reducing the content of heavy metal ions such as arsenic and lead in instant tea, comprising the following steps:

[0028] ①Using a green tea with high heavy metal content as raw material, a green tea concentrate with a mass concentration of 15% was prepared after extraction, centrifugation, filtration, and concentration processes;

[0029] 2. the green tea concentrate obtained in the above steps 1. is passed through the resin column equipped with LX-8 macroporous adsorption resin at normal temperature, and the volume ratio of the green tea concentrate and LX-8 macroporous adsorption resin is 20:1, adjust After the resin is adsorbed, the flow rate of the permeate is 1BV / h, collect the column liquid A, and then use 40% edible alcohol as the eluent to elute the tea polyphenols adsorbed on the LX-8 macroporous adsorption resin, adjust the elution The flow rate of the liquid is 2BV / h, and the elution is stopped when the elution volume is 4.5BV, the eluate is co...

Embodiment 3

[0036] A method for reducing the content of heavy metal ions such as arsenic and lead in instant tea, comprising the following steps:

[0037] ①Using tea leaves as raw materials, after extracting, centrifuging, filtering, and concentrating processes, a tea concentrate with a mass concentration of 5% is prepared;

[0038]2. Pass the tea concentrate obtained in the above step ① through the resin column equipped with LX-8 macroporous adsorption resin at normal temperature, the volume ratio of the tea concentrate and LX-8 macroporous adsorption resin is 10:1, adjust The flow rate of the permeate after resin adsorption is 3BV / h, collect the column liquid A, and then use 40% edible alcohol as the eluent to elute the tea polyphenols adsorbed on the LX-8 macroporous adsorption resin, adjust the elution The flow rate of the liquid is 1BV / h, and the elution is stopped when the elution volume is 3BV, the eluate is collected, and the eluate is subjected to vacuum rotary evaporation to obt...

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PUM

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Abstract

The invention relates to a method for reducing the content of heavy metal ions such as arsenic and lead in instant tea. The method comprises the steps of preparing a concentrated solution in mass concentration of 5 to 15 percent by virtue of steps including extraction, centrifuging, filtering, concentration and the like, adsorbing tea polyphenol of the concentrate solution by virtue of a resin column which is filled with LX-8 macroporous adsorption resin, adsorbing heavy metal ions including arsenic, lead and the like in the column passing solution by virtue of a resin column which is filled with chelating resin LSA-100, collecting an elution solution of LX-8 resin and a column passing solution of LSA-100, uniformly mixing the elution solution and the column passing solution to obtain a mixed solution, concentrating and drying the mixed solution, and preparing the instant tea powder with low heavy metal content. The removal rate of the heavy metal ions such as the arsenic and lead in the instant tea powder processed in the method can reach 50 percent, the loss rate of the tea polyphenol is less than 5 percent, the operation is simple, the original quality of the instant tea is maximally reserved, the heavy metal removal effect is obvious, the restriction of the raw material for producing the instant tea can be broken through, the selection range of the raw material is enlarged, and the safety and the market competence of the instant tea product can be improved.

Description

technical field [0001] The invention relates to the field of tea deep processing quality safety control, in particular to a method for reducing the content of heavy metal ions such as arsenic and lead in instant tea. Background technique [0002] Heavy metal ions in tea mainly include lead (Pb), arsenic (As), copper (Cu), cadmium (Cd), mercury (Hg), chromium (Cr), etc. pollution, tea quality problems caused by excessive heavy metal content are increasing. These heavy metals such as arsenic, lead, cadmium, mercury, etc. are not necessary for life activities, and excessive intake will affect human health. More and more tea importing countries have increased The limit index of heavy metal content in tea has been set. The problem of heavy metal content in tea has affected the export of tea in my country; have occurred, therefore, the control of heavy metals in tea and instant tea production has received more and more attention. my country's national standard for solid beverages h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23F3/30
Inventor 陈来荫吴庆山岳鹏翔
Owner DAMIN FOODSTUFF ZHANGZHOU CO LTD
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