CN202903680U - Simple and easy device for rapidly testing nitrite - Google Patents
Simple and easy device for rapidly testing nitrite Download PDFInfo
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- CN202903680U CN202903680U CN 201220507779 CN201220507779U CN202903680U CN 202903680 U CN202903680 U CN 202903680U CN 201220507779 CN201220507779 CN 201220507779 CN 201220507779 U CN201220507779 U CN 201220507779U CN 202903680 U CN202903680 U CN 202903680U
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- reagent
- nitrite
- reaction tube
- easy device
- cap
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Abstract
The utility model discloses a simple and easy device for rapidly testing nitrite. The device comprises a reagent cap for storing reagent, and a transparent reaction tube with printed scales for storing the reagent, wherein the reagent cap is fixedly connected with the reaction tube through a valve piston; the valve piston is used for sealing and guiding the reagent in the reagent cap; and a bottom part of the reaction tube is in a circular shape. According to the simple and easy device for rapidly testing the nitrite, prepared integral reagent can be adopted, so that operating personnel can be prevented from contacting chemical medicine directly, no other instrument and auxiliary equipment is needed, a testing result is judged through comparing colors by naked eyes, and the simple and easy device for rapidly testing the nitrite is simple, convenient and quick, has high sensitivity, and meets the national testing standards.
Description
Technical field
The utility model relates to a kind of easy device of fast detecting nitrite.
Background technology
Nitrite (common have sodium nitrite and potassium nitrite) is white or little yellow crystal or granulated powders, and odorless is soluble in water.Nitrite becomes the minimum toxic dose of human oral to be about 0.1 g, and oral minimum lethal dose (MLD) is about 1.0 g ~ 5.0 g.Cause the main touch opportunity of nitrite poisoning to have: dining room or catering trade mistake are used it as salt; Take food bitter well water, placed the prepared food meat that cure foods of a specified duration or adjuvant exceed standard; Edible vegetables of being rich in nitrate and nitrite etc.
In view of nitrite to the human body serious harm, for the bad reaction such as avoiding the nitrite in food residual quantity to exceed standard causing that the eater poisons, each state all formulates series of standards with strict control nitrite use amount and residual quantity.World Health Organization's regulation, the every daily ingestion Safety and allowable of nitrate and nitrite amount (ADI) is respectively 0 ~ 3.7mg/kg body weight/day (in nitrate) and 0～0.06 mg/kg body weight/day (in nitrite).European Union's suggestion nitrite must not be used for baby food, and nitrate should limit addition.U.S.'s sootiness meat and smoked salmon final finished nitrate and remnant nitrite are limited the quantity of and are respectively 500 ppm and 200 ppm, and it is 10 ppm that sootiness yaito tuna final finished nitrite is limited the quantity of.
China's Partial Food nitrite limit standard (in NaNO2, mg/kg): salt (refined salt), milk powder≤2; The fragrant tripe of sausage (sausage), catsup and pickled vegetables, Cantonese cured meat≤20; Fresh meat class, fresh fish class, grain≤3; Meat products, ham sausage, bowel lavage class≤30; Vegetables≤4; Other canned meat, other pickles can≤50; Infant formula, bright powdered egg≤5; Western-style boiling, smoked ham and can, Western-style ham can≤70.
The method that is applied at present to detect nitrite in food has photometry, polarography, chromatography etc.These methods adopt different principles, at aspects such as condition control, stability, sensitivity quality are arranged respectively.But all there is a common shortcoming in existing checkout equipment: need necessary instrument to detect in the laboratory, the Simple fast that is not easy to the basic unit scene detects.
The utility model content
In view of this, the technical problems to be solved in the utility model is to provide a kind of easy device of fast detecting nitrite, is convenient to the nitrite in the Simple fast detection food at basic unit scene.
For solving the problems of the technologies described above, the technical solution of the utility model is achieved in that a kind of easy device of fast detecting nitrite, comprise the reagent cap of storing reagent and print graduated transparent and store the reaction tube of reagent, this reagent cap is fixedly connected with by the valve body piston with reaction tube, the valve body piston seals and water conservancy diversion the reagent in the reagent cap, and the bottom of described reaction tube is circular.
Further, be provided with the fine duct of perforation in the described valve body piston, this fine duct connects and is arranged in logical reagent cap and the reaction tube.
Further, the material of described reagent cap is tygon, polystyrene, polypropylene, Polyvinylchloride or ABS plastic.
Further, the material of valve body piston is tygon, polystyrene, polypropylene, Polyvinylchloride or ABS plastic.
Further, described reaction tube material is tygon, polystyrene, polypropylene, Polyvinylchloride, polyamide-based, polycarbonate, polyesters, polyphenylene oxide, polymethylmethacrylate or polyurethane.
Further, described fine duct material is tygon, polystyrene, polypropylene, Polyvinylchloride, polyamide-based, polycarbonate, polyesters, polyphenylene oxide, polymethylmethacrylate or polyurethane.
The technique effect that the utility model reaches is as follows: the easy device of the utility model fast detecting nitrite, can adopt prefabricated integrated reagent, avoid operating personnel directly to contact chemicals, need not other instruments and utility appliance, naked eyes contrast color is judged testing result, easy to be quick, highly sensitive, satisfy national examination criteria requirement.
Description of drawings
Fig. 1 is the structural representation of the easy device of fast detecting nitrite.
Embodiment
As shown in Figure 1, easy device 1 for the utility model fast detecting nitrite, comprise the reagent cap 11 of storing reagent and print graduated transparent and store the reaction tube 13 of reagent, this reagent cap 11 is fixedly connected with by valve body piston 12 with reaction tube 13, reagent in 12 pairs of reagent caps 11 of valve body piston seals and water conservancy diversion, the bottom of reaction tube 13 is circular, and the centre does not have snap ring.Be provided with the fine duct 14 of perforation in the valve body piston 12, fine duct 14 connects and is arranged in logical reagent cap 11 and the reaction tube 13.The material of reagent cap 11 and valve body piston 12 is tygon, polystyrene, polypropylene, Polyvinylchloride or ABS plastic.The material of reaction tube 13 and fine duct 14 is tygon, polystyrene, polypropylene, Polyvinylchloride, polyamide-based, polycarbonate, polyesters, polyphenylene oxide, polymethylmethacrylate or polyurethane.
The concrete detecting step of the easy device of the utility model fast detecting nitrite is as follows:
1. reagent cap reagent loads
1) reagent preparation
Getting 5 ~ 50 g sulfanilic acid, 1 ~ 10 g hydrochloride naphthodiamide, 50 ~ 500 g tartrate and 50 ~ 500 g PEG pulverizes mixing and obtained reagent in about 1 minute in comminutor (medicinal herb grinder).
2) reagent loads
2. pick-up unit assembling
1) with tight valve body piston 12 bottom of combining closely with reagent cap 11 of inserting of fine duct 14 1 ends;
2) again with the connection of reagent cap 11, valve body piston 12, fine duct 14, and with fine duct 14 bottoms insertion reaction tube 13, guarantee that reaction tube 13 is easy to extract from valve body piston 12 when detecting use, form complete detector tube after reaction tube 13 is connected with valve body piston 12.
3. detection principle:
Reagent is preserved in the reagent cap 11 of sealing, is added into during detection in the reaction tube 12, reacts with sample nitrite in the reaction tube 12.In the certain limit, content of nitrite is higher, and it is darker to develop the color.Determine content of nitrite in the sample with the standard color comparison card colorimetric.
The above is preferred embodiment of the present utility model only, is not be used to limiting protection domain of the present utility model.
Claims (5)
1. the easy device of a fast detecting nitrite, it is characterized in that, comprise the reagent cap of storing reagent and print graduated transparent and store the reaction tube of reagent, this reagent cap is fixedly connected with by the valve body piston with reaction tube, the valve body piston seals and water conservancy diversion the reagent in the reagent cap, and the bottom of described reaction tube is circular.
2. the easy device of fast detecting nitrite as claimed in claim 1 is characterized in that, is provided with the fine duct of perforation in the described valve body piston, and this fine duct connects and is arranged in logical reagent cap and the reaction tube.
3. the easy device of fast detecting nitrite as claimed in claim 1 is characterized in that, the material of described reagent cap is tygon, polystyrene, polypropylene, Polyvinylchloride or ABS plastic.
4. the easy device of fast detecting nitrite as claimed in claim 1 is characterized in that, the material of valve body piston is tygon, polystyrene, polypropylene, Polyvinylchloride or ABS plastic.
5. the easy device of fast detecting nitrite as claimed in claim 1 is characterized in that, described reaction tube material is tygon, polystyrene, polypropylene, Polyvinylchloride, polyamide-based, polyesters, polyphenylene oxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220507779 CN202903680U (en) | 2012-09-27 | 2012-09-27 | Simple and easy device for rapidly testing nitrite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220507779 CN202903680U (en) | 2012-09-27 | 2012-09-27 | Simple and easy device for rapidly testing nitrite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202903680U true CN202903680U (en) | 2013-04-24 |
Family
ID=48124337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220507779 Expired - Lifetime CN202903680U (en) | 2012-09-27 | 2012-09-27 | Simple and easy device for rapidly testing nitrite |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202903680U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105628634A (en) * | 2016-03-02 | 2016-06-01 | 山东安博仪器股份有限公司 | Reagent for detecting nitrite in food and nitrite detection method |
-
2012
- 2012-09-27 CN CN 201220507779 patent/CN202903680U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105628634A (en) * | 2016-03-02 | 2016-06-01 | 山东安博仪器股份有限公司 | Reagent for detecting nitrite in food and nitrite detection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130424 |
|
| CX01 | Expiry of patent term |