CN203350189U - Device for detecting total sulfur/sulfur dioxide in carbon dioxide used in food - Google Patents
Device for detecting total sulfur/sulfur dioxide in carbon dioxide used in food Download PDFInfo
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- CN203350189U CN203350189U CN 201320352610 CN201320352610U CN203350189U CN 203350189 U CN203350189 U CN 203350189U CN 201320352610 CN201320352610 CN 201320352610 CN 201320352610 U CN201320352610 U CN 201320352610U CN 203350189 U CN203350189 U CN 203350189U
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- dioxide
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Abstract
A device for detecting total sulfur/sulfur dioxide in carbon dioxide used in food belongs to a gas composition analyzing device with a combined function. The detecting device is provided with a four-way valve, sample gas enters an injection valve through the four-way valve to test the content of total sulfur in the carbon dioxide used in the tested food, the sample gas enters the injection valve through the four-way valve and a sulfur dioxide removing tube filled with a sulfur dioxide removing catalyst to test the content of total sulfur except the sulfur dioxide in the carbon dioxide used in the tested food, and the content of the sulfur dioxide is obtained through the difference value between the content of total sulfur and the content of the total sulfur except the sulfur dioxide. The sulfur dioxide in a gas sample can be removed by 100% because of the gas sample entering the sulfur dioxide removing tube filled with the sulfur dioxide removing catalyst. The device greatly increases the reliability and the accuracy of the testing result of the total sulfur component (except sulfur dioxide) in a carbon dioxide product, and the technical difficult problem needed to be solved in a long term in the industry is solved.
Description
Technical field
The utility model relates to a kind of device of food with total sulfur/sulphuric dioxide in carbon dioxide that detect, and belongs to the gas composition analysis device of combination function.
Background technology
At present, be widely used carbon dioxide as antiseptic, refrigerant, extractant, protective gas or carbonating agent in industries such as food.Because from the corrosion-resistant angle, carbon dioxide can to microorganism work be due to: 1. increasing of partial pressure of carbon dioxide affects the utilization of aerobe to oxygen.2. carbon dioxide can stop the respiratory metabolism of various microorganisms.If 3. in food, have great amount of carbon dioxide, can change the pH value of food surface, and make microorganism lose the requirement of existence.Carbon dioxide is for " antioxidant " effect of greasiness food, dairy products, fast food, peanut and other oxysensible dried products and all much important than its antibacterial action on fruit, vegetables and the impact of cereal respiration in storage environment.Carbon dioxide in fruit juice, soft drink, grape wine mainly plays antisepsis, and it also plays refrigerant effect in soft drink in addition, hinders growth of microorganism, lethally has a liking for oxygen animalcule, and outstanding fragrance is composed with beverage, the comfortable mouthfeel of killing.
The carbon dioxide product extensively used with food additives now to thering is certain toxicity, the sulfide index that can produce again strong peculiar smell controls very harsh.The meeting of international beverage technology, national standard etc. are limited to 0.1PPm to the control of the total sulfur index except sulphuric dioxide, and sulphuric dioxide is controlled at 1.0PPm.
Existing sulfide analysis method comprises: be oxidized to a coulomb method, ultraviolet fluorescence method, sulfuretted hydrogen colorimetric (colour band) method and flame luminosity vapor-phase chromatography etc.Said method, for carbon dioxide total sulfur, SO 2 index test the time, is all carried out following route: 1. measure total sulfur content; 2. measure content of sulfur dioxide; 3. by the difference of total sulfur content and content of sulfur dioxide, provide the total sulfur content except sulphuric dioxide.Due to the content of the total sulfur content except sulphuric dioxide much smaller than sulphuric dioxide, difference subtracts result and often has very large analytical error.
Summary of the invention
The utility model provides a kind of device of food with total sulfur/sulphuric dioxide in carbon dioxide that detect, this device should be able to detect total sulfur content and the total sulfur content except sulphuric dioxide in carbon dioxide for food, easy to operate, improve detection efficiency, the price of instrumentation is also lower.
The technical solution adopted in the utility model is: a kind of device of food with total sulfur/sulphuric dioxide in carbon dioxide that detect, it comprises a sampling valve, sample gas is from sample gas import b enters sampling valve, from the outlet of sample gas, e discharges, it is characterized in that: further comprising a four-way valve, described sampling valve adopts pipeline to be connected with four-way valve, sample gas enters sampling valve through four-way valve, or sample gas is through four-way valve be filled with the removal sulfur dioxide pipe that removes the sulphuric dioxide catalyzer and enter sampling valve, between sampling valve and flame photometric detector (FPD), adopt pipeline to be connected.
Described sample gas import b connects the interface 1 of four-way valve, and the interface 2 of four-way valve connects the interface 4 of sampling valve.
The interface 3-4 of described four-way valve connects respectively one and is filled with the removal sulfur dioxide pipe that removes the sulphuric dioxide catalyzer.
The beneficial effects of the utility model are: this detection food is provided with a four-way valve with the device of total sulfur sulphuric dioxide in carbon dioxide, sample gas enters sampling valve through four-way valve, for measuring the total sulfur content of tested food with carbon dioxide, sample gas is through four-way valve and be filled with the removal sulfur dioxide pipe that removes the sulphuric dioxide catalyzer and enter sampling valve, for measuring the total sulfur content except sulphuric dioxide of tested food with carbon dioxide, by the difference of total sulfur content and the total sulfur content except sulphuric dioxide, draw the content of sulphuric dioxide.Owing to entering the gas sample be filled with in the removal sulfur dioxide pipe that removes the sulphuric dioxide catalyzer, the sulphuric dioxide energy 100% in the gas sample is removed.This device is improved greatly reliable, the accuracy of total sulfur (except sulphuric dioxide) composition detection result in the carbon dioxide product, solved in industry and needed for a long time the technical barrier solved.
The accompanying drawing explanation
Fig. 1 is a kind of device fundamental diagram of food with total sulfur in carbon dioxide that detect.
Fig. 2 be a kind of detect food with in carbon dioxide except sulphuric dioxide the device fundamental diagram of total sulfur.
In figure: 1, four-way valve, 2, sampling valve, the 3, first pressure maintaining valve, 3a, the second pressure maintaining valve, 3b, the 3rd pressure maintaining valve, 4, flow stabilizing valve, 5, tensimeter, the 6, first vapour lock, 6a, the second vapour lock, 6b, the 3rd vapour lock, 7, needle valve, 8, the removal sulfur dioxide pipe, 9, flame photometric detector (FPD); A, carrier gas, b, the import of sample gas, c, hydrogen, d, air, e, the outlet of sample gas.
Embodiment
Referring to accompanying drawing, structure of the present utility model is described further.
Fig. 1,2 shows a kind of fundamental diagram of food with the device of total sulfur/sulphuric dioxide in carbon dioxide that detect.
In figure, this device has four tunnel air inlets: hydrogen c is admitted to flame photometric detector (FPD) 9 through the second pressure maintaining valve 3a, flow stabilizing valve 4 and the first vapour lock 6 successively.Air d is admitted in flame photometric detector (FPD) 9 through the 3rd pressure maintaining valve 3b and the second vapour lock 6a, consists of the bypass line of the second vapour lock 6a needle valve 7 and the 3rd vapour lock 6b, the air inlet amount that enters flame photometric detector (FPD) 9 for adjusting.Sample gas is from sample gas import b after four-way valve 1 enters sampling valve 2, and from the outlet of sample gas, e discharges.The interface 3-4 of four-way valve 1 connects one and is filled with the removal sulfur dioxide pipe 8 that removes the sulphuric dioxide catalyzer, removes the sulphuric dioxide catalyzer and is produced by Dalian bright gaseous mass monitoring center, and the commercially available prod model is HGM-S2.Carrier gas a is after the first pressure maintaining valve 3, and by sampling valve 2, carrier gas a has sneaked into sample gas in sampling valve 2 time by a certain percentage, and last carrier gas a enters flame photometric detector (FPD) 9 test-acceptings.
One, detect total sulfur content (as shown in Figure 1) in carbon dioxide for food
At first rotate four-way valve 1, its interface 1-2, interface 3-4 are communicated with, the interface 1-6 of sampling valve 2 is communicated with, and the first pressure maintaining valve 3 connects the interface 1 of sampling valve 2, and the interface 6 of sampling valve 2 connects flame photometric detector (FPD) 9.Sample gas enters sampling valve 2 from sample gas import b through four-way valve 1, carrier gas (nitrogen) a is after the first pressure maintaining valve 3, by sampling valve 2, carrier gas (nitrogen) a has sneaked into sample gas in sampling valve 2 time by a certain percentage, and last carrier gas a enters flame photometric detector (FPD) 9 test-acceptings.The result that flame photometric detector (FPD) 9 detects is the parameter of detected food with total sulfur in carbon dioxide.
Two, detect food with in carbon dioxide except sulphuric dioxide total sulfur content (as shown in Figure 2)
At first rotate four-way valve 1, its interface 1-4, interface 2-3 are communicated with, the interface 1-6 of sampling valve 2 is communicated with, and the first pressure maintaining valve 3 connects the interface 1 of sampling valve 2, and the interface 6 of sampling valve 2 connects flame photometric detector (FPD) 9.Sample gas is from sample gas import b through four-way valve 1 be filled with the removal sulfur dioxide pipe 8 that removes the sulphuric dioxide catalyzer and enter sampling valve 2, carrier gas (nitrogen) a is after the first pressure maintaining valve 3, by sampling valve 2, carrier gas (nitrogen) a has sneaked into sample gas in sampling valve 2 time by a certain percentage, and last carrier gas a enters flame photometric detector (FPD) 9 test-acceptings.The result that flame photometric detector (FPD) 9 detects for detected food with in carbon dioxide except sulphuric dioxide the parameter of total sulfur.
Three, content of sulfur dioxide is calculated
Content of sulfur dioxide=total sulfur content-total sulfur content except sulphuric dioxide.
Four, measuring accuracy analyzing examples (employing pairing comparision)
Due to domestic and international food grade carbon dioxide product standard to the control index of total sulfur except sulphuric dioxide than the low order of magnitude of sulphuric dioxide, after measuring total sulfur and sulphuric dioxide, it is very big that difference subtracts the analytical error of total sulfur result except sulphuric dioxide obtained, the direct measured value that following table is each analytical approach:
| Oxidation microcoulomb method | The sulfuretted hydrogen colour band method | Ultraviolet fluorescence method | Vapor-phase chromatography | This method |
| Total sulfur | Total sulfur | Total sulfur | Subitem sulphur | Total sulfur |
| Sulphuric dioxide | Sulphuric dioxide | Sulphuric dioxide | Sulphuric dioxide | Total sulfur (not containing sulphuric dioxide) |
Except this method, the non-sulphuric dioxide total sulfur content in additive method all adopts the indirect calculation method.If with sulphuric dioxide 10
-6magnitude, non-sulphuric dioxide total sulfur 10
-7the magnitude meter, the relative deviation of mensuration process 10%, will expand as 100% for the result of calculation deviation of non-sulphuric dioxide total sulfur.
And adopt the non-sulphuric dioxide total sulfur Direct Determination of technique scheme, can maintain the mensuration precision of method.
Claims (3)
1. one kind is detected the device of food with total sulfur/sulphuric dioxide in carbon dioxide, it comprises a sampling valve (2), sample gas is from sample gas import b enters sampling valve (2), from the outlet of sample gas, e discharges, it is characterized in that: further comprising a four-way valve (1), described sampling valve (2) adopts pipeline to be connected with four-way valve (1), sample gas enters sampling valve (2) through four-way valve (1), or sample gas is through four-way valve (1) be filled with the removal sulfur dioxide pipe (8) that removes the sulphuric dioxide catalyzer and enter sampling valve (2), between sampling valve (2) and flame photometric detector (FPD) (9), adopt pipeline to be connected.
2. a kind of device of food with total sulfur/sulphuric dioxide in carbon dioxide that detect according to claim 1, is characterized in that: the interface 1 of described sample gas import b connection four-way valve (1), the interface 4 of the interface 2 connection sampling valves (2) of four-way valve (1).
3. a kind of device of food with total sulfur/sulphuric dioxide in carbon dioxide that detect according to claim 1, it is characterized in that: the interface 3-4 of described four-way valve (1) connects respectively one and is filled with the removal sulfur dioxide pipe (8) that removes the sulphuric dioxide catalyzer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320352610 CN203350189U (en) | 2013-06-19 | 2013-06-19 | Device for detecting total sulfur/sulfur dioxide in carbon dioxide used in food |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320352610 CN203350189U (en) | 2013-06-19 | 2013-06-19 | Device for detecting total sulfur/sulfur dioxide in carbon dioxide used in food |
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| CN203350189U true CN203350189U (en) | 2013-12-18 |
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| CN 201320352610 Expired - Lifetime CN203350189U (en) | 2013-06-19 | 2013-06-19 | Device for detecting total sulfur/sulfur dioxide in carbon dioxide used in food |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102928401A (en) * | 2012-10-16 | 2013-02-13 | 中昊光明化工研究设计院有限公司 | Device and method for detecting total sulfur/sulfur dioxide in carbon dioxide for food |
| CN104931447A (en) * | 2015-06-11 | 2015-09-23 | 吉林省谱尼测试科技有限公司 | Method for detecting cadmium chloride and cadmium sulfide in pigment simultaneously |
-
2013
- 2013-06-19 CN CN 201320352610 patent/CN203350189U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102928401A (en) * | 2012-10-16 | 2013-02-13 | 中昊光明化工研究设计院有限公司 | Device and method for detecting total sulfur/sulfur dioxide in carbon dioxide for food |
| CN104931447A (en) * | 2015-06-11 | 2015-09-23 | 吉林省谱尼测试科技有限公司 | Method for detecting cadmium chloride and cadmium sulfide in pigment simultaneously |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131218 |