CN113210374A - Cleaning method of digestion tank - Google Patents
Cleaning method of digestion tank Download PDFInfo
- Publication number
- CN113210374A CN113210374A CN202110032508.XA CN202110032508A CN113210374A CN 113210374 A CN113210374 A CN 113210374A CN 202110032508 A CN202110032508 A CN 202110032508A CN 113210374 A CN113210374 A CN 113210374A
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- CN
- China
- Prior art keywords
- cleaning
- digestion tank
- temperature
- solution
- keeping
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B2203/00—Details of cleaning machines or methods involving the use or presence of liquid or steam
- B08B2203/007—Heating the liquid
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
The invention provides a method for cleaning a digestion tank, which is characterized in that cleaning solution is added into the digestion tank instead of soak solution, and high-temperature pressurization or microwave programmed heating is adopted to accelerate cleaning. The invention uses the mixed solution of nitric acid and hydrogen peroxide as the cleaning solution, has strong oxidizing property and reducibility, has good effect of removing heavy metal residues, and is superior to the nitric acid solution (1+5) and the nitric acid solution (1+4) used at present; can be cleaned with other similar cleaning mixed liquid to generate chlorine gas, and the reaction product is NO2And H2O, the environmental pollution is less; the cleaning liquid can be configured in a small amount, so that waste is avoided, and the cleaning cost is saved; the cleaning period is about 4-5 h, the working time is saved, and the inspection efficiency is improved.
Description
Technical Field
The invention belongs to the technical field of food detection, and particularly relates to a cleaning method of a digestion tank.
Background
The digestion tank is applied to sample pretreatment of chemical analysis methods such as gas phase, liquid phase, plasma spectrum mass spectrum, atomic absorption and the like, dissolves a sample, is used for detecting heavy metals and trace elements (calcium, iron, zinc, lead, arsenic, mercury, copper, cadmium, chromium and the like) in food in the biological medicine and health care product industry, and needs to be cleaned after detection.
In the national standard method, the digestion tank is treated by soaking in a nitric acid solution (1+5) overnight or soaking in a nitric acid solution (1+4) for 24 hours, so that the use and turnover of the digestion tank are influenced; the raw materials are washed by tap water and deionized water, so that the washing time is long, the washing effect is poor (the inner tank is yellow and has residues), the consumption of reagents for soaking is high, and the environmental pollution is high; due to poor cleaning effect and the existence of pollutant residues, the detection result has large deviation, and the accuracy of the detection result is influenced.
When the nitric acid solution (1+5) or the nitric acid solution (1+4) is adopted for soaking, a large amount of soaking liquid needs to be prepared to cover the digestion tank body, the digestion tank body can be repeatedly used for about 4 times, the repeated use frequency is low, reagent waste is caused, and the cost is high.
Therefore, it is an urgent problem for those skilled in the art to develop a method capable of efficiently cleaning the digestion tank in view of the above problems.
Disclosure of Invention
In order to solve the problems, the invention discloses a method for cleaning a digestion tank.
In order to achieve the purpose, the invention provides the following technical scheme:
a cleaning method for a digestion tank is characterized in that cleaning liquid is added into the digestion tank instead of soak solution, and high-temperature pressurization or microwave program heating is adopted to accelerate cleaning.
Further, the specific method is as follows:
(1) cleaning the digestion tank;
(2) adding a cleaning solution into the digestion tank;
(3) screwing down the outer tank, and pressurizing at high temperature or placing in a microwave digestion instrument for temperature programming;
(4) after cooling, pouring out the cleaning solution, and cleaning again;
(5) and drying to finish cleaning.
Further, the cleaning liquid in the step (2) is formed by mixing nitric acid and hydrogen peroxide according to the volume ratio of 1: 1.
Further, the cleaning method in the step (1) and the step (4) comprises the following steps: the digestion tank is cleaned by tap water and then washed by deionized water.
Further, the specific method of the step (3) is as follows: screwing down the outer tank, putting the outer tank into an oven, heating to 130 ℃, pressurizing and baking for 4h, or putting the outer tank into a microwave digestion instrument, and carrying out temperature programming.
Further, the specific steps of the programmed temperature rise are as follows:
(a) keeping the microwave power at 1200W, raising the temperature to 120 ℃ at a constant speed, and keeping the temperature for 10 min;
(b) keeping the microwave power at 1200W, uniformly heating from 120 ℃ to 160 ℃, and keeping the temperature for 10 min;
(c) keeping the microwave power at 1200W, raising the temperature from 160 ℃ to 180 ℃ at a constant speed, and keeping the temperature for 15 min.
Furthermore, the time for constant temperature rise in the steps (a), (b) and (c) is 5 min.
Further, the amount of the washing solution added in the step (2) was 6 ml.
Further, the drying temperature in the step (5) is 80 ℃.
Compared with the prior art, the invention has the following beneficial effects:
1. the mixed solution of nitric acid and hydrogen peroxide is used as cleaning solution, has strong oxidizing property and reducibility, has good effect of removing heavy metal residues, and is superior to the existing nitric acid solution (1+5) and nitric acid solution (1+ 4);
2. can be cleaned with other similar cleaning mixed liquid to generate chlorine gas, and the reaction product is NO2And H2O, the environmental pollution is less;
3. the cleaning liquid can be configured in a small amount, so that waste is avoided, and the cleaning cost is saved;
4. the cleaning period is about 4-5 h, the working time is saved, and the inspection efficiency is improved.
Detailed Description
The technical solutions provided by the present invention will be described in detail with reference to specific examples, and it should be understood that the following specific embodiments are only illustrative and not intended to limit the scope of the present invention.
The invention relates to a method for cleaning a digestion tank, which comprises the following specific steps:
(1) cleaning the digestion tank;
(2) adding 6ml of cleaning solution into the digestion tank, wherein the cleaning solution is formed by mixing nitric acid and hydrogen peroxide according to the volume ratio of 1: 1;
(3) screwing down the outer tank, putting the outer tank into an oven, heating to 130 ℃, and carrying out pressurized baking for 4h, or putting the outer tank into a microwave digestion instrument, and carrying out temperature programming;
(4) after cooling, pouring out the cleaning solution, and cleaning again;
(5) drying at 80 ℃ to finish cleaning.
The cleaning method in the above step (1) and step (4) is: the digestion tank is cleaned by tap water and then is washed by deionized water.
The specific steps of the temperature rise in the step (3) are as follows:
(a) keeping the microwave power at 1200W, uniformly heating for 5min, heating to 120 ℃, and keeping the temperature for 10 min;
(b) keeping the microwave power at 1200W, uniformly heating from 120 ℃ for 5min, heating to 160 ℃, and keeping the temperature for 10 min;
(c) keeping the microwave power at 1200W, uniformly heating from 160 ℃ for 5min, heating to 180 ℃, and keeping the temperature for 15 min.
In order to prove that the scheme provided by the invention is more excellent, the digestion tank is cleaned by three groups of cleaning liquids, the absorption values of Ca, Fe and Zn in the digestion tank are detected, and a parallel comparison test is carried out, which specifically comprises the following steps:
finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and those skilled in the art should understand that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all the modifications and equivalent substitutions should be covered by the claims of the present invention.
Claims (9)
1. A cleaning method of a digestion tank is characterized in that: the cleaning method is to add cleaning liquid to a digestion tank instead of soak solution, and to accelerate cleaning by adopting high-temperature pressurization or microwave programmed temperature rise.
2. The method for cleaning a digestion tank according to claim 1, characterized in that: the specific method comprises the following steps:
(1) cleaning the digestion tank;
(2) adding a cleaning solution into the digestion tank;
(3) screwing down the outer tank, and pressurizing at high temperature or placing in a microwave digestion instrument for temperature programming;
(4) after cooling, pouring out the cleaning solution, and cleaning again;
(5) and drying to finish cleaning.
3. The method for cleaning a digestion tank according to claim 2, characterized in that: the cleaning liquid in the step (2) is prepared by mixing nitric acid and hydrogen peroxide according to the volume ratio of 1: 1.
4. The method for cleaning a digestion tank according to claim 2, characterized in that: the cleaning method in the step (1) and the step (4) comprises the following steps: the digestion tank is cleaned by tap water and then is washed by deionized water.
5. The method for cleaning a digestion tank according to claim 2, characterized in that: the specific method of the step (3) is as follows: screwing down the outer tank, putting the outer tank into an oven, heating to 130 ℃ and baking under pressure for 4h, or putting the outer tank into a microwave digestion instrument for temperature programming.
6. The method for cleaning a digestion tank according to claim 5, wherein: the specific steps of the temperature programming are as follows:
(a) keeping the microwave power at 1200W, raising the temperature to 120 ℃ at a constant speed, and keeping the temperature for 10 min;
(b) keeping the microwave power at 1200W, uniformly heating from 120 ℃ to 160 ℃, and keeping the temperature for 10 min;
(c) keeping the microwave power at 1200W, raising the temperature from 160 ℃ to 180 ℃ at a constant speed, and keeping the temperature for 15 min.
7. The method for cleaning a digestion tank according to claim 6, wherein: the time for constant temperature rise in the steps (a), (b) and (c) is 5 min.
8. The method for cleaning a digestion tank according to claim 3, characterized in that: the addition amount of the cleaning solution in the step (2) is 6 ml.
9. The method for cleaning a digestion tank according to claim 2, characterized in that: the drying temperature in the step (5) is 80 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110032508.XA CN113210374A (en) | 2021-01-11 | 2021-01-11 | Cleaning method of digestion tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110032508.XA CN113210374A (en) | 2021-01-11 | 2021-01-11 | Cleaning method of digestion tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113210374A true CN113210374A (en) | 2021-08-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110032508.XA Pending CN113210374A (en) | 2021-01-11 | 2021-01-11 | Cleaning method of digestion tank |
Country Status (1)
| Country | Link |
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| CN (1) | CN113210374A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106733996A (en) * | 2017-02-25 | 2017-05-31 | 威海出入境检验检疫局检验检疫技术中心 | A kind of hermetically sealed micro-wave digestion pipe acid cleaning unit |
| CN207057210U (en) * | 2017-05-12 | 2018-03-02 | 福建中烟工业有限责任公司 | Device for steaming counteracting tank |
| CN107764801A (en) * | 2016-08-20 | 2018-03-06 | 江西三和金业有限公司 | A kind of method that stable measure scraps graphite crucible residue gold |
| CN207857492U (en) * | 2017-12-18 | 2018-09-14 | 深圳市德诚旺科技有限公司 | Novel strong acids counteracting tank washer |
| CN209432574U (en) * | 2018-11-30 | 2019-09-24 | 河南师范大学 | A kind of counteracting tank convenient for cleaning |
| CN211757408U (en) * | 2020-03-13 | 2020-10-27 | 山东赛欧斯检测有限公司 | Microwave digestion tank cleaning device |
-
2021
- 2021-01-11 CN CN202110032508.XA patent/CN113210374A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107764801A (en) * | 2016-08-20 | 2018-03-06 | 江西三和金业有限公司 | A kind of method that stable measure scraps graphite crucible residue gold |
| CN106733996A (en) * | 2017-02-25 | 2017-05-31 | 威海出入境检验检疫局检验检疫技术中心 | A kind of hermetically sealed micro-wave digestion pipe acid cleaning unit |
| CN207057210U (en) * | 2017-05-12 | 2018-03-02 | 福建中烟工业有限责任公司 | Device for steaming counteracting tank |
| CN207857492U (en) * | 2017-12-18 | 2018-09-14 | 深圳市德诚旺科技有限公司 | Novel strong acids counteracting tank washer |
| CN209432574U (en) * | 2018-11-30 | 2019-09-24 | 河南师范大学 | A kind of counteracting tank convenient for cleaning |
| CN211757408U (en) * | 2020-03-13 | 2020-10-27 | 山东赛欧斯检测有限公司 | Microwave digestion tank cleaning device |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20210806 |