CN101536713A - Method for removing pesticide residue from tea - Google Patents
Method for removing pesticide residue from tea Download PDFInfo
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- CN101536713A CN101536713A CN200910038620A CN200910038620A CN101536713A CN 101536713 A CN101536713 A CN 101536713A CN 200910038620 A CN200910038620 A CN 200910038620A CN 200910038620 A CN200910038620 A CN 200910038620A CN 101536713 A CN101536713 A CN 101536713A
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- tealeaves
- ozone water
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Abstract
The invention discloses a method for removing pesticide residue from tea. The method adopts ozone water or ozone water-photocatalytic combined treatment to remove pesticide residue on picked tea. The treatment method can greatly lower or fully remove the pesticide residue on the tea, has easy, practical and easily controlled processing steps and low cost, is beneficial to environmental protection and hardly influences active substances in the tea.
Description
Technical field
The invention belongs to tea-manufacturing technology, be specifically related to a kind of preprocess method of removing remains of pesticide in the tealeaves.
Background technology
China is second-biggest-in-the-world Tea Production state, but in recent years, China's Tea Production is faced with severe situation, main problem is that residues of pesticides are quite serious, according to the industrial and commercial reason office in Guangdong Province sampling result in 2006, the tealeaves that sell in 64 big small-sized markets, 7 cities, wholesale market, Sole Proprietorship shop, disqualification rate mainly are because residues of pesticides exceed standard up to more than 50%.In addition, residual the exceeding standard of tealeaves farming becomes the bottleneck of China's tea export, because developed country utilizes technical advantage, formulated more and more stricter tealeaves Pesticide Residue standard, and the regulation of European Union has been increased to 210 by in January, 2006; Residues of pesticides project beyond 210 adopts " default standard " of 0.01mg/kg; Limiting the quantity of of 5a,6,9,9a-hexahydro-6,9-methano-2,4 reduced to 0.01mg/kg suddenly from original 30mg/kg especially; And Japan is increased to 176 with import tealeaves residue detection project by 71 also in " the positive list system " in May, 2006.From 2.8 ten thousand tons of 1.6 ten thousand tons of reducing to 2005 year by year in 2000, the accumulative total range of decrease was up to 42.8% for the tea export amount of China.
Tea Production is separation with the harvesting, total field planting and processing two big processes of being divided into, production routine mainly comprises: plantation-dispenser-(safety interval)-harvesting-airing-complete-twist with the fingers rubs-drying etc., the manufacturing procedure after completing may be different because of different local tea varieties.
Agricultural chemicals residual comes from the field planting process in early stage, and according to relevant report, China's tealeaves residues of pesticides except from the direct sprinkling, also from indirect acquisition, comprising: the first, from soil, absorb, as BHC; The second, carry by water; The 3rd, the air drift.So the tealeaves that pluck in the field contains the residues of pesticides of being introduced by field operation or environmental pollution unavoidably.These agricultural chemicals are brought into the process segment immediately.
The Tea Processing technology of China was used till today from ancient times always, usually the tealeaves after plucking is promptly directly processed without any processing, and in today that natural environment has generally worsened, this original technology will cause the pollutant in the environment residual in a large number in tealeaves.
Because agricultural chemicals is stronger in the absorption affinity on tealeaves surface, if will remove the agricultural chemicals on the tealeaves, it is not good to the removal effect of agricultural chemicals to depend merely on the cleaning that is soaked in water, and especially for water-soluble lower agricultural chemicals, removal effect is very limited.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art part, the method for remains of pesticide in a kind of effective removal tealeaves is provided.
A kind of method of removing remains of pesticide in the tealeaves, it is to adopt Ozone Water to handle tealeaves.The present invention is through a large amount of experiments, and discovery can be removed residual agricultural chemicals after adopting Ozone Water to handle tealeaves.
As further optimization, tealeaves can be placed Ozone Water-photocatalysis Combined Treatment equipment, adopt Ozone Water and ultraviolet light to the tealeaves Combined Treatment, then can reduce the residues of pesticides of tealeaves greatly.
As further optimization, the weight ratio of tealeaves and Ozone Water is about 1: 9-1: 11, and consistency of ozone water remains on 0.7-0.9mg/L, and ultraviolet source is UV etc., wavelength 254nm, luminous intensity 43uw/cm
2
As further optimization, can around ultraviolet light, be provided with TiO
2Nickel screen as photochemical catalyst to improve degradation efficiency.
As further optimization, when remains of pesticide only was organic phosphates, wherein Ozone Water was alkaline Ozone Water, and the pH value is between 8～10.
Compared with prior art, the present invention has following beneficial effect: processing method of the present invention can make tealeaves remains of pesticide after being processed as finished product remove fully, and the simple and easy control of treatment step is with low cost, be of value to environmental protection, do not influence the active principle in the tealeaves substantially.
The specific embodiment
Embodiment 1
The fresh tea leaf that will contain the 1.9mg/kg cypermethrin places Ozone Water-photocatalysis Combined Treatment equipment, adds the water that is equivalent to 10 times of weight of fresh tea leaf, feeds ozone gas and makes consistency of ozone water remain on 0.8mg/L; Opening luminous intensity is 43uw/cm
2245nm uviol lamp source, uviol lamp is with quartzy sleeve pipe outward, and TiO is arranged
2Nickel screen be centered around around the uviol lamp; Handle draining after 30 minutes, complete again, knead, other tea making steps such as drying.
Through this preliminary treatment, prepared tealeaves is compared with traditional tea making method, and the cypermethrin persticide residue is become fully by 0.22mg/kg and can't check, thereby has met the regulation of limiting the quantity of of European Union.Tea Polyphenols has only descended 10% than traditional tea making method.
Experiment shows, when the residual quantity near 2.0mg/kg of cypermethrin at fresh tea leaf, soak with clear water that clearance only is 35% after 30 minutes, and at Ozone Water-same equal time of photocatalysis Combined Treatment, clearance reaches 85%.This is because ultraviolet light can excite the generation of OH when contacting with photochemical catalyst, especially at O
3Under the situation about existing during water, can cause a series of radical reactions, inspire a large amount of OH fast, this OH is degradable organic pollutant effectively.This experimental result shows that OH has good degradation equally to the agricultural chemicals that is adsorbed on the tealeaves surface.
Embodiment 2
The fresh tea leaf that will contain residual 7.8mg/kg malathion places Ozone Water generation equipment, add the water that is equivalent to 10 times of weight of fresh tea leaf, and the pH value of regulating water is 10, consistency of ozone water remains on 0.8mg/L, handle draining after 30 minutes, complete again, knead, other tea making steps such as drying.
Through this preliminary treatment, the residual quantity of malathion is reduced to 0.9mg/kg, and, with this preprocess method in conjunction with the traditional tea preparation method after, prepared tealeaves is compared with traditional tea making method, the malathion persticide residue is become fully by 0.15mg/kg and can't check, and Tea Polyphenols has only descended 10% than traditional tea making method.
Experiment also shows, when remains of pesticide is organophosphorus insecticide, under alkaline Ozone Water is handled separately, can reach the effect that slightly is better than Ozone Water under the alkalescence-photocatalysis Combined Treatment.When the near 8mg/kg of organophosphorus pesticide malathion residual concentration, both clearances are respectively 88% and 82%.
In addition, aspect the influence of tealeaves active principle, ozone-photocatalysis has certain oxidation to some active principle such as Tea Polyphenols in the tealeaves, but because in this process, ozone-photocatalysis has suppressed the effect of enzyme in the tealeaves simultaneously, has blocked the decomposition of polyphenol oxidase to Tea Polyphenols, therefore, generally speaking, little to the influence of tealeaves active principle.Experiment shows that frying becomes to sample tea again after the method preliminary treatment, and Tea Polyphenols only reduces by 10%.
Claims (6)
1. a method of removing remains of pesticide in the tealeaves is characterized in that adopting Ozone Water to handle tealeaves.
2. the method for claim 1 is characterized in that tealeaves is adopted Ozone Water and ultraviolet light Combined Treatment.
3. method as claimed in claim 1 or 2 is characterized in that the weight ratio of described tealeaves and Ozone Water is about 1: 9-1: 11, and consistency of ozone water remains on 0.7-0.9mg/L.
4. method as claimed in claim 2 is characterized in that described ultraviolet light is UV, wavelength 254nm, luminous intensity 43uw/cm
2
5. as claim 2 or 4 described methods, it is characterized in that being provided with TiO around the described ultraviolet light
2Nickel screen.
6. the method for claim 1 is characterized in that the pH value of described Ozone Water is 8-10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100386203A CN101536713B (en) | 2009-04-14 | 2009-04-14 | Method for removing pesticide residue from tea |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100386203A CN101536713B (en) | 2009-04-14 | 2009-04-14 | Method for removing pesticide residue from tea |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101536713A true CN101536713A (en) | 2009-09-23 |
| CN101536713B CN101536713B (en) | 2012-05-09 |
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ID=41120285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100386203A Expired - Fee Related CN101536713B (en) | 2009-04-14 | 2009-04-14 | Method for removing pesticide residue from tea |
Country Status (1)
| Country | Link |
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| CN (1) | CN101536713B (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102742682A (en) * | 2012-07-24 | 2012-10-24 | 王志深 | Method for removing residual pesticide on dried tea leaves |
| CN103349111A (en) * | 2013-07-23 | 2013-10-16 | 华南农业大学 | Method for reducing imidacloprid residue in tea drinks |
| CN104174607A (en) * | 2014-08-06 | 2014-12-03 | 镇江市丹徒区茗缘茶叶专业合作社 | Cleaning method for tea leaves |
| CN104206937A (en) * | 2014-08-22 | 2014-12-17 | 中国人民解放军总后勤部军需装备研究所 | Advanced treatment method for pesticide residues on surfaces of fruits and vegetables |
| CN104663933A (en) * | 2015-02-17 | 2015-06-03 | 杭州艺福堂茶业有限公司 | Disposable tea processing technology |
| CN105394519A (en) * | 2015-10-26 | 2016-03-16 | 青海出入境检验检疫局综合技术中心 | Method for ozone assisted ultraviolet degradation of pesticide residues in wolfberry fruits |
| CN106942572A (en) * | 2017-05-17 | 2017-07-14 | 张松波 | The method for removing pesticide residue from tea |
| CN107019062A (en) * | 2017-05-17 | 2017-08-08 | 张松波 | The method that tealeaves removes residues of pesticides |
| CN107258946A (en) * | 2017-07-18 | 2017-10-20 | 广西桂平市蒙圩镇柱强种养专业合作社 | A kind of cleaning method of tealeaves efficient lossless |
| CN107412813A (en) * | 2017-05-03 | 2017-12-01 | 文山学院 | A kind of method that pseudo-ginseng Pesticide Residues are removed using ozone |
| CN108323591A (en) * | 2018-05-15 | 2018-07-27 | 凤冈县秀姑茶业有限公司 | A kind of processing technology of green tea |
| CN109601657A (en) * | 2019-01-24 | 2019-04-12 | 刘景岳 | A kind of tea treatment method removing pesticide residue |
| CN112273465A (en) * | 2020-11-20 | 2021-01-29 | 新昌县群星茶业有限公司 | Flower-fragrance black tea and processing method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101176491B (en) * | 2006-11-11 | 2011-04-27 | 大闽食品（漳州）有限公司 | Method for processing instant tea powder without pesticide residue |
| CN101180997A (en) * | 2007-12-21 | 2008-05-21 | 朱光 | Technique for making tea |
-
2009
- 2009-04-14 CN CN2009100386203A patent/CN101536713B/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102742682A (en) * | 2012-07-24 | 2012-10-24 | 王志深 | Method for removing residual pesticide on dried tea leaves |
| CN102742682B (en) * | 2012-07-24 | 2014-10-22 | 王志深 | Method for removing residual pesticide on dried tea leaves |
| CN103349111A (en) * | 2013-07-23 | 2013-10-16 | 华南农业大学 | Method for reducing imidacloprid residue in tea drinks |
| CN104174607A (en) * | 2014-08-06 | 2014-12-03 | 镇江市丹徒区茗缘茶叶专业合作社 | Cleaning method for tea leaves |
| CN104206937A (en) * | 2014-08-22 | 2014-12-17 | 中国人民解放军总后勤部军需装备研究所 | Advanced treatment method for pesticide residues on surfaces of fruits and vegetables |
| CN104663933A (en) * | 2015-02-17 | 2015-06-03 | 杭州艺福堂茶业有限公司 | Disposable tea processing technology |
| CN105394519A (en) * | 2015-10-26 | 2016-03-16 | 青海出入境检验检疫局综合技术中心 | Method for ozone assisted ultraviolet degradation of pesticide residues in wolfberry fruits |
| CN107412813A (en) * | 2017-05-03 | 2017-12-01 | 文山学院 | A kind of method that pseudo-ginseng Pesticide Residues are removed using ozone |
| CN106942572A (en) * | 2017-05-17 | 2017-07-14 | 张松波 | The method for removing pesticide residue from tea |
| CN107019062A (en) * | 2017-05-17 | 2017-08-08 | 张松波 | The method that tealeaves removes residues of pesticides |
| CN107258946A (en) * | 2017-07-18 | 2017-10-20 | 广西桂平市蒙圩镇柱强种养专业合作社 | A kind of cleaning method of tealeaves efficient lossless |
| CN108323591A (en) * | 2018-05-15 | 2018-07-27 | 凤冈县秀姑茶业有限公司 | A kind of processing technology of green tea |
| CN109601657A (en) * | 2019-01-24 | 2019-04-12 | 刘景岳 | A kind of tea treatment method removing pesticide residue |
| CN112273465A (en) * | 2020-11-20 | 2021-01-29 | 新昌县群星茶业有限公司 | Flower-fragrance black tea and processing method thereof |
| CN112273465B (en) * | 2020-11-20 | 2022-12-02 | 新昌县群星茶业有限公司 | Flower-fragrance black tea and processing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101536713B (en) | 2012-05-09 |
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Granted publication date: 20120509 Termination date: 20140414 |