CN210322861U - Device for measuring content of N-nitrosamine compound in food - Google Patents
Device for measuring content of N-nitrosamine compound in food Download PDFInfo
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- CN210322861U CN210322861U CN201921167344.6U CN201921167344U CN210322861U CN 210322861 U CN210322861 U CN 210322861U CN 201921167344 U CN201921167344 U CN 201921167344U CN 210322861 U CN210322861 U CN 210322861U
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Abstract
The utility model discloses a device for measuring the content of N-nitrosamine compounds in food, in particular to a laboratory appliance, which comprises a fixed frame, a distillation device, a condensing device and a flask for containing distillate; the distillation device comprises a first container and a fixed tray, the first container comprises an upper containing chamber and a lower containing chamber, the bottom of the lower containing chamber is attached to the fixed tray, the top of the upper containing chamber is communicated with an air outlet pipe, and the upper containing chamber and the lower containing chamber are fixedly connected in a threaded manner; the condensing equipment includes first connecting pipe, second connecting pipe and steam channel, and steam channel's both ends communicate with the free end of first connecting pipe, second connecting pipe respectively, and steam channel's outside cover is equipped with the comdenstion water passageway, and the one end of comdenstion water passageway is fixed mutually with the outer tube wall of first connecting pipe, and the other end is fixed mutually with the outer tube wall of second connecting pipe. The device provided by the utility model be used for surveying the experiment of N-nitrosamine compound in the food specially, can improve experimenter's work efficiency greatly.
Description
Technical Field
The utility model relates to a laboratory appliance, in particular to a device for measuring the content of N-nitrosamine compounds in food.
Background
The pretreatment process for determining the N-nitrosamine compounds in the food safety national standard food comprises the following steps: 200g of sample is accurately weighed, 100mL of water and 50g of sodium chloride are added into a distillation tube, and the mixture is fully mixed. 100mL of dichloromethane and a small amount of ice are added into a 500mL flat-bottom flask to receive condensate, an outlet of a condenser pipe extends to a position below the dichloromethane liquid level, the flat-bottom flask is placed in an ice bath, a distillation device is started to heat and distill, the heating device is closed after 400mL of condensate is collected, and the distillation is stopped. In a flat-bottomed flask containing the distillate, 20g of sodium chloride and 3mL of sulfuric acid were added, and the mixture was stirred to completely dissolve the sodium chloride. The solution was then transferred to a 500mL separatory funnel, shaken for 5min, vented if necessary, allowed to stand for separation, and the dichloromethane layer was transferred to another flat bottom flask. And finally, carrying out rotary evaporation on the dichloromethane layer, accurately metering the volume to 1.0mL, shaking up, and then determining by GC-MS.
However, in the above experiment process, the experimenter uses different laboratory tools at each different step, which results in the experimenter needing to assemble the tools before the start of the measurement experiment, so that the experiment steps are complicated, and the improvement of the experiment efficiency is not facilitated.
SUMMERY OF THE UTILITY MODEL
The utility model provides a device of N-nitrosamine class compound assay in food, the device are arranged in the experiment of survey N-nitrosamine class compound in food specially, can improve experimenter's work efficiency greatly.
In order to achieve the above object, the utility model provides a following technical scheme:
a device for measuring the content of N-nitrosamine compounds in food comprises a fixing frame, a distilling device, a condensing device and a flask for containing distillate; the distillation device comprises a first container and a fixed tray, wherein the first container is used for loading mixed liquor, the first container comprises an upper accommodating chamber and a lower accommodating chamber, the bottom of the lower accommodating chamber is attached to the fixed tray, the top of the upper accommodating chamber is communicated with an air outlet pipe, and the upper accommodating chamber and the lower accommodating chamber are fixedly connected in a threaded manner; condensing equipment includes the first connecting pipe that communicates with the outlet duct, second connecting pipe and the steam channel who communicates with the flask, the both ends of steam channel communicate with the free end of first connecting pipe, second connecting pipe respectively mutually, the outside cover of steam channel is equipped with the comdenstion water passageway, the one end of comdenstion water passageway is fixed mutually with the outer tube wall of first connecting pipe, and the other end is fixed mutually with the outer tube wall of second connecting pipe.
Preferably, the inner side of the upper accommodating chamber is provided with a first fixing thread, and correspondingly, the opening end of the lower accommodating chamber is provided with a second fixing thread which is in threaded connection with the first fixing thread.
Preferably, the inner side of the upper accommodating chamber is provided with a first accommodating groove, correspondingly, the lower accommodating chamber is provided with a second accommodating groove, and the first accommodating groove and the second accommodating groove enclose a cavity matched with the cavity for accommodating the sealing ring.
Preferably, the steam passage is threaded.
Preferably, the first connecting pipe and the second connecting pipe are both horn-shaped, and hoses are arranged in the middle of the first connecting pipe and the second connecting pipe.
Preferably, a condensed water inlet pipe is arranged on the lower side of the condensed water channel close to the first connecting pipe, and a condensed water outlet pipe is arranged on the upper side of the condensed water channel close to the second connecting pipe.
Preferably, a liquid through pipe is arranged in the flask and is communicated with the open end of the flask.
As preferred, the device still includes and divides the liquid device, divide the liquid device to fight including dividing the liquid, the upper end of dividing the liquid fill can be dismantled with the connecting pipe that the bottom of flask was fixed mutually and be connected, be equipped with first on-off valve on the connecting pipe, the bottom of dividing the liquid fill is equipped with the drain pipe, be equipped with the second on-off valve on the drain pipe, the tip of drain pipe is equipped with the fixed disk, the fixed disk is equipped with the through-hole that is linked together with the drain pipe.
Preferably, the fixing frame comprises a first fixing plate, a second fixing plate and a fixing rod, the fixing rod comprises an upper rod, a lower rod and a fastening bolt, one end of the upper rod is fixed to the lower end of the second fixing plate, the other end of the upper rod is sleeved inside the lower rod, and one end, back to the upper rod, of the lower rod is fixed to the upper end of the first fixing plate.
Preferably, one end of the fixing tray, which faces away from the accommodating chamber, is fixed to a second fixing plate, and the second fixing plate is provided with a fixing hole for fixing and placing the flask.
The utility model has the advantages that:
the utility model discloses in, mix in the liquid can add first container in advance. While the first vessel may be placed in a heating mantle, the distillation operation may be carried out. As the vapor passed through the condensing unit, it was liquefied and flowed into the flask. During the experiment, the flask was placed in an ice-water bath. Through using the device to carry out N-nitrosamine class compound assay in the food, can improve experimenter's efficiency greatly, and the experiment is all accomplished in same suit, can avoid experimenter to take place the accident and empty or reveal at the transfer reagent in-process, and then cause the influence to the experiment.
Drawings
FIG. 1 is a schematic structural diagram of an apparatus for measuring the content of N-nitrosamines in a food in this embodiment;
FIG. 2 is a schematic cross-sectional view of an apparatus for measuring the content of N-nitrosamines in a food according to this embodiment;
fig. 3 is an enlarged view of a portion a in fig. 2.
In the figure: 11. lower pole, 12, upper pole, 13, support the bolt tightly, 14, first fixed plate, 15, the second fixed plate, 21, fixed tray, 22, lower holding chamber, 220, the second holding tank, 221, the fixed screw thread of second, 23, go up the holding chamber, 230, the outlet duct, 231, first holding tank, 32, the hose, 33, the comdenstion water passageway, 331, the comdenstion water exit tube, 332, the comdenstion water advances the pipe, 41, the liquid pipe that leads to, 42, the flask, 43, first on-off valve, 44, the connecting pipe, 5, divide the liquid fill, 51, the second on-off valve, 52, the drain pipe, 53, the fixed disk.
Detailed Description
The embodiment provides a technical scheme:
as shown in FIGS. 1 to 3, a device for measuring the content of N-nitrosamine compounds in food comprises a fixing frame, a distilling device, a condensing device and a flask 42 for containing distillate; the distillation device comprises a first container for loading mixed liquor and a fixed tray 21, the first container comprises an upper accommodating chamber 23 and a lower accommodating chamber 22, the bottom of the lower accommodating chamber 22 is attached to the fixed tray 21, the top of the upper accommodating chamber 23 is communicated with an air outlet pipe 230, and the upper accommodating chamber 23 and the lower accommodating chamber 22 are fixed in a threaded manner; the condensing equipment includes the first connecting pipe that communicates with outlet duct 230, second connecting pipe and the steam channel who communicates with flask 42, and the both ends of steam channel communicate with the free end of first connecting pipe, second connecting pipe respectively, and the outside cover of steam channel is equipped with comdenstion water passageway 33, and comdenstion water passageway 33's one end is fixed mutually with the outer tube wall of first connecting pipe, and the other end is fixed mutually with the outer tube wall of second connecting pipe.
As shown in fig. 1 and 3, the inner side of the upper receiving chamber 23 is provided with a first fixing screw, and correspondingly, the open end of the lower receiving chamber 22 is provided with a second fixing screw 221 threadedly fixed with the first fixing screw. When loading the reagent, the laboratory worker can unscrew the upper and lower chambers 23 and 22, load the reagent, and seal and fix the reagent. If necessary, a heating jacket or a water bath may be provided outside the first container for heating the reagent therein to perform the distillation operation.
As shown in fig. 3, the inner side of the upper receiving chamber 23 is provided with a first receiving groove 231, and correspondingly, the lower receiving chamber 22 is provided with a second receiving groove 220, and the first receiving groove 231 and the second receiving groove 220 enclose a cavity adapted to receive the sealing ring. In order to make the sealing effect better, the first receiving groove 231 and the second receiving groove 220 enclose the inside of the synthetic cavity and are provided with the sealing ring, so that the joint of the upper receiving chamber 23 and the lower receiving chamber 22 and the sealing ring can be extruded to a certain extent, and the sealing effect is achieved.
In order to make the contact time between the steam and the condensed water longer, the steam channel is threaded.
In this embodiment, the first connecting pipe and the second connecting pipe are both horn-shaped, and the middle parts of the first connecting pipe and the second connecting pipe are both provided with a hose 32. The hose 32 is provided to facilitate adjustment of the angle of the condensing means by the experimenter, so as to facilitate the flow of the liquefied vapor into the flask.
In this embodiment, a condensed water inlet pipe 332 is provided at a lower side of the condensed water channel 33 near the first connection pipe, and a condensed water outlet pipe 331 is provided at an upper side of the condensed water channel 33 near the second connection pipe.
The liquid flowing pipe 41 is used for directly flowing the condensed and liquefied steam into the lower part of the liquid in the flask in advance, the liquid flowing pipe 41 is arranged in the flask 42, and the liquid flowing pipe 41 is communicated with the open end of the flask 42.
This embodiment is still including dividing the liquid device, divides the liquid device to include and divides liquid fill 5, divides the connecting pipe 44 that the upper end of liquid fill 5 and the bottom of flask 42 are fixed mutually to dismantle and is connected, is equipped with first on-off valve 43 on the connecting pipe 44, divides the bottom of liquid fill 5 to be equipped with drain pipe 52, is equipped with second on-off valve 51 on the drain pipe 52, and the tip of drain pipe 52 is equipped with fixed disk 53, and the fixed disk is equipped with the through-hole that is linked together with drain pipe 52.
In this embodiment, the fixing frame includes a first fixing plate 14, a second fixing plate 15 and a fixing rod, the fixing rod includes an upper rod 12, a lower rod 11 and a fastening bolt 13, one end of the upper rod 12 is fixed to the lower end of the second fixing plate 15, the other end of the upper rod is sleeved inside the lower rod 11, and one end of the lower rod 11, which is back to the upper rod 12, is fixed to the upper end of the first fixing plate 14.
In this embodiment, an end of the fixing tray 21 facing away from the lower receiving chamber 22 is fixed to the second fixing plate 15, and the second fixing plate 15 is provided with fixing holes for fixedly placing the flasks 42.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (10)
1. A device for measuring the content of N-nitrosamine compounds in food is characterized by comprising a fixed frame, a distilling device, a condensing device and a flask (42) for containing distillate;
the distillation device comprises a first container and a fixed tray (21), wherein the first container is used for loading mixed liquor, the first container comprises an upper accommodating chamber (23) and a lower accommodating chamber (22), the bottom of the lower accommodating chamber (22) is attached to the fixed tray (21), the top of the upper accommodating chamber (23) is communicated with an air outlet pipe (230), and the upper accommodating chamber (23) and the lower accommodating chamber (22) are fixedly connected in a threaded mode;
condensing equipment includes the first connecting pipe that communicates with outlet duct (230), second connecting pipe and the steam channel who communicates with flask (42), the both ends of steam channel communicate with the free end of first connecting pipe, second connecting pipe respectively, the outside cover of steam channel is equipped with comdenstion water passageway (33), the one end of comdenstion water passageway (33) is fixed mutually with the outer tube wall of first connecting pipe, and the other end is fixed mutually with the outer tube wall of second connecting pipe.
2. A device for determining the content of N-nitrosamines in a foodstuff according to claim 1, wherein the inner side of said upper chamber (23) is provided with a first fixing thread, and correspondingly the open end of said lower chamber (22) is provided with a second fixing thread (221) which is screwed to the first fixing thread.
3. A device for determining the content of N-nitrosamines in a foodstuff according to claim 1, wherein said upper chamber (23) is provided on the inside with a first housing groove (231), and correspondingly said lower chamber (22) is provided with a second housing groove (220), said first (231) and second (220) housing grooves enclosing a cavity adapted to receive said sealing ring.
4. An apparatus for determining the content of N-nitrosamines in a food product as claimed in claim 1, wherein said steam pathway is threaded.
5. An apparatus for determining the content of N-nitrosamines in a food product according to claim 1, wherein said first and second connection tubes are formed as ox horn, and a hose (32) is provided in the middle of said first and second connection tubes.
6. An apparatus for determining the content of N-nitrosamines in a food product according to claim 1, wherein said condensation water channel (33) is provided with a condensation water inlet pipe (332) adjacent to the lower side of the first connecting pipe, and said condensation water channel (33) is provided with a condensation water outlet pipe (331) adjacent to the upper side of the second connecting pipe.
7. An apparatus for determining the content of N-nitrosamines in a food according to claim 1, wherein said flask (42) is provided with a liquid pipe (41) inside, said liquid pipe (41) is connected to the open end of said flask (42).
8. A device for measuring the content of N-nitrosamines in food according to claim 1, further comprising a liquid separating device, wherein said liquid separating device comprises a liquid separating funnel (5), the upper end of said liquid separating funnel (5) is detachably connected with a connecting pipe (44) fixed to the bottom end of a flask (42), said connecting pipe (44) is provided with a first open-close valve (43), the bottom end of said liquid separating funnel (5) is provided with a liquid outlet pipe (52), said liquid outlet pipe (52) is provided with a second open-close valve (51), the end of said liquid outlet pipe (52) is provided with a fixing disc (53), and said fixing disc is provided with a through hole communicated with said liquid outlet pipe (52).
9. A device for measuring the content of N-nitrosamines compounds in food according to claim 1, wherein said fixing frame comprises a first fixing plate (14), a second fixing plate (15) and a fixing rod, said fixing rod comprises an upper rod (12), a lower rod (11) and a fastening bolt (13), one end of said upper rod (12) is fixed to the lower end of said second fixing plate (15), the other end is sleeved inside said lower rod (11), and the end of said lower rod (11) facing away from said upper rod (12) is fixed to the upper end of said first fixing plate (14).
10. An apparatus for determining the content of N-nitrosamines in a foodstuff according to claim 1, wherein the end of said fixing tray (21) facing away from said lower receiving chamber (22) is fixed to a second fixing plate (15), said second fixing plate (15) being provided with fixing holes for fixing and placing a flask (42).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921167344.6U CN210322861U (en) | 2019-07-23 | 2019-07-23 | Device for measuring content of N-nitrosamine compound in food |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921167344.6U CN210322861U (en) | 2019-07-23 | 2019-07-23 | Device for measuring content of N-nitrosamine compound in food |
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| Publication Number | Publication Date |
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| CN210322861U true CN210322861U (en) | 2020-04-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921167344.6U Active CN210322861U (en) | 2019-07-23 | 2019-07-23 | Device for measuring content of N-nitrosamine compound in food |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114414323A (en) * | 2021-12-13 | 2022-04-29 | 通标标准技术服务（天津）有限公司 | Pretreatment device for detection of nitrosamine in food |
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2019
- 2019-07-23 CN CN201921167344.6U patent/CN210322861U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114414323A (en) * | 2021-12-13 | 2022-04-29 | 通标标准技术服务（天津）有限公司 | Pretreatment device for detection of nitrosamine in food |
| CN114414323B (en) * | 2021-12-13 | 2023-08-18 | 通标标准技术服务（天津）有限公司 | Pretreatment device for detecting nitrosamine in food |
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Denomination of utility model: A device for determining the content of N-nitrosamine compounds in food Effective date of registration: 20220325 Granted publication date: 20200414 Pledgee: Huzhou Bank Co.,Ltd. Hangzhou Branch Pledgor: GREENTOWN NONGKE DETECTION TECHNOLOGY Co.,Ltd. Registration number: Y2022330000406 |