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A method for reducing the content of heavy metal ions including arsenic and lead in instant tea

A technology for heavy metal ions and instant tea, which is applied in the field of reducing the content of heavy metal ions including arsenic and lead in instant tea, can solve the problems of exceeding the standard and high heavy metals, and achieves improved safety, easy operation, and obvious heavy metal removal effect. Effect

Active Publication Date: 2018-01-05
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 including 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, thereby improving Market competitiveness of instant tea products

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 including 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 al...

Embodiment 2

[0027] A method for reducing the content of heavy metal ions including 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 concentrated solution obtained by the above steps 1. is passed through the resin column equipped with LX-8 macroporous adsorbent resin at normal temperature, and the volume ratio of the described green tea concentrated solution and LX-8 macroporous adsorbed 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, and adjust the elution The flow rate of the liquid is 2BV / h, and the elution is stopped when the elution ...

Embodiment 3

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

[0037] ①Using tea leaves as raw materials, a tea concentrate with a mass concentration of 5% is prepared after extraction, centrifugation, filtration, and concentration processes;

[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...

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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 tea leaves are extracted, centrifuged, filtered, concentrated and other processes are prepared into a concentrated solution with a mass concentration of 5-15%, and the concentrated solution is passed through the LX The resin column of ‑8 macroporous adsorption resin adsorbs tea polyphenols, and then passes the column liquid through the resin column filled with chelating resin LSA‑100 to adsorb heavy metal ions such as arsenic and lead, and collects the eluate of LX‑8 resin and LSA ‑100 resin column solution, mixed evenly, then concentrated and dried to prepare instant tea powder with low heavy metal content. The removal rate of heavy metal ions such as arsenic and lead in the instant tea powder obtained by the treatment of the present invention reaches 50%, the loss rate of tea polyphenols is less than 5%, the operation is simple, and the prepared product retains the original quality of instant tea to the greatest extent. The heavy metal removal effect is obvious, breaking through the raw material limitation of instant tea production, expanding the range of raw material selection, and improving the safety and market competitiveness of instant tea products.

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 including 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...

Claims

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Application Information

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Patent Type & Authority Patents(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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