CN210278435U - Special suction filter device of synthetic pigment pretreatment of detecting - Google Patents

Abstract

The utility model discloses a special suction filtration device of synthetic pigment before-detecting processing, including crucible filter, anti-pumping loss pipe, buchner flask, hollow glass return bend, rubber stopper, safety buffer bottle, vacuum pump, crucible filter export and anti-pumping loss pipe upper end sealing connection, anti-pumping loss pipe lower extreme stretches into buchner flask, anti-pumping loss pipe shaft outer wall and buchner flask's bottleneck sealing connection, buchner flask's side mouth is through vacuum tube A and hollow glass return bend sealing connection, hollow glass return bend runs through from top to bottom from rubber stopper middle part, rubber stopper sealing sets up the bottleneck at safety buffer flask, safety buffer flask side mouth is through vacuum tube B and vacuum pump sealing connection; the utility model can completely extract the food synthetic pigment, and has convenient and simple operation and easy popularization.

Description

Special suction filter device of synthetic pigment pretreatment of detecting

Technical Field

The utility model relates to a food synthesis colorant survey device field specifically is a special suction filtration device of synthetic pigment pretreatment before detecting.

Background

The inspection of synthetic pigment in food generally comprises three steps, namely sample pretreatment, pigment extraction and pigment determination, wherein the effective extraction of pigment components in food is important and is an important precondition for detecting illegally added synthetic pigment in food.

At the present stage, the national standard food for the determination of synthetic colorants (GB/T5009.35-2003) specifies 3 methods for the detection of 8 synthetic colorants, namely, safranin, lemon yellow, amaranth, carmine, sunset yellow, erythrosine, brilliant blue, indigo, which are extracted by polyamide adsorption or liquid-liquid distribution, wherein the polyamide adsorption process is described as follows: adding a citric acid solution into a sample solution to adjust the pH value to 6, heating to 60 ℃, adding a little water into 1G of polyamide powder to be prepared into porridge, pouring the porridge into the sample solution, stirring for a moment, carrying out suction filtration by using a G3 vertical melting funnel, washing 3-5 times by using water with the pH value of 4 at 60 ℃, then washing 3-5 times by using a methanol-formic acid mixed solution, washing to be neutral by using water, desorbing for 3-5 times by using an ethanol-ammonia water-water mixed solution until pigments are completely desorbed, collecting a desorption solution, adding acetic acid for neutralization, evaporating to be nearly dry, adding water for dissolution, fixing the volume to 5mL, filtering by using a 0.45 mu m microporous filter membrane, and analyzing by using a high performance liquid chromatograph. Through comparison of experimental data for many times, the suction filtration and extraction time is long by using a G3 vertical melting funnel device in the polyamide adsorption method, the detection effect is general, and a certain influence is caused on the extraction and detection of synthetic pigment lemon yellow.

SUMMERY OF THE UTILITY MODEL

To above technical problem, the utility model aims to reach the technical effect that a synthetic pigment of food can be drawed completely is provided, the special suction filter device of synthetic pigment detection pretreatment that convenient operation is simple and easily popularize simultaneously.

For solving the technical problem, a synthetic pigment detects special suction filter device of pretreatment, including crucible filter, prevent loss pipe, buchner flask, safety buffer bottle, vacuum pump, crucible filter export with prevent loss pipe upper end sealing connection, prevent that loss pipe lower extreme stretches into in the buchner flask, prevent loss pipe shaft outer wall with buchner flask's bottleneck sealing connection, buchner flask's side mouth passes through vacuum tube A and hollow glass return bend sealing connection, hollow glass return bend runs through from rubber stopper middle part top-down through, the rubber stopper is sealed to be set up the bottleneck of safety buffer bottle, safety buffer flask side mouth pass through vacuum tube B with vacuum pump sealing connection.

Further, the crucible type filter specification is G3.

Further, the anti-pumping-out pipe is made of polyethylene plastics, and the surface of the pipe body is of a frosted structure.

Furthermore, the inner wall of the mouth of the suction bottle and the outer wall of the outlet of the crucible type filter are both of frosted structures.

Further, the vacuum tube A and the vacuum tube B are made of latex materials

Compared with the prior art, the utility model has the following advantage:

1. the utility model discloses sealed being provided with in crucible formula filter below and preventing taking out and losing the plastic tubing, can effectively improving the extraction rate of synthetic pigment for melting the funnel perpendicularly, especially can effectively improve the extraction rate of synthetic pigment in polyamide adsorption method to improved the accuracy of testing result, through adding the mark experiment in to the sample, handled through this device, it adds the mark rate of recovery and is 98%.

2. The utility model discloses a crucible formula filter uses with the cooperation of preventing the pumping loss plastic tubing to and the setting of safe buffer bottle, can effectually prevent the loss of desorption liquid in the buchner flask, make the testing result more accurate.

3. The utility model discloses a sealed anti-pumping loss plastic tubing of having placed in the middle of buchner flask and crucible filter, be provided with the safety buffer bottle simultaneously between buchner flask and vacuum pump, can effectually prevent during the suction filtration liquid among the buchner flask gets into the vacuum pump to prevent damaging the vacuum pump.

Drawings

Fig. 1 is a schematic connection diagram of the present invention;

fig. 2 is a schematic structural diagram of the middle crucible type filter, the anti-pumping loss plastic pipe and the suction filtration bottle of the present invention.

In the figure: 1. the device comprises a crucible type filter, 2, a hollow glass bent pipe, 3, a rubber stopper, 4, vacuum pipes B and 5, a vacuum pump, 6, an anti-pumping loss pipe, 7, vacuum pipes A and 8, a filter flask, 9 and a safety buffer flask.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

The special suction filtration device for the pretreatment of the detection of the synthetic pigment comprises a crucible type filter 1, an anti-pumping loss pipe 6, a suction bottle 8, a safe buffer bottle 9 and a vacuum pump 5, wherein an outlet of the crucible type filter 1 is hermetically connected with the upper end of the anti-pumping loss pipe 6, the lower end of the anti-pumping loss pipe 6 extends into the suction bottle 8, the outer wall of a pipe body of the anti-pumping loss pipe 6 is hermetically connected with a bottle mouth of the suction bottle 8, a side mouth of the suction bottle 8 is hermetically connected with a hollow glass bent pipe 2 through a vacuum pipe A7, the hollow glass bent pipe 2 penetrates through the middle part of a rubber plug 3 from top to bottom, the rubber plug 3 is hermetically arranged at the bottle mouth of the safe buffer bottle 9, and the side mouth of the safe buffer bottle 9 is hermetically connected with the vacuum pump 5 through a vacuum pipe B.

Preferably, the crucible filter 1 has a specification of G3.

In order to prevent acid-base corrosion, the anti-pumping-loss pipe 6 is made of polyethylene plastic, and the surface of the pipe body is of a frosted structure.

In order to improve the connection sealing performance, the inner wall of the mouth of the filtration bottle 8 and the outer side of the outlet of the crucible type filter 1 are both of a frosted structure.

Preferably, the vacuum tubes A and B are made of latex.

The utility model discloses a working process does: before the device is used, all the connecting devices are required to be connected in a sealing mode, the outer surface of the outlet of the crucible type filter 1 and the inner surface of the pumping loss prevention pipe 6 are both of a frosted structure and can be completely combined, effective sealing can be achieved through the action of suction pressure of a pumping pump, the outer surface of the pumping loss prevention pipe 6 and the inner side of the mouth of the pumping bottle 8 are both of frosted structures, and effective sealing can also be achieved through the action of suction pressure of the pumping pump; starting a vacuum pump 5 (ALUE2.0L air vacuum pump), so that the suction filtration device is in a vacuum negative pressure state, the suction pressure of the vacuum pump 5 can also play a certain sealing effect on the connection of the device, and after the vacuum value of the vacuum pump 5 is stable, solution washing and desorption are carried out; and slowly pouring the solution to be filtered into the G3 crucible filter 1 as required, allowing the solution to slowly flow into the filter flask 8 from the inner wall of the anti-pumping pipe 6 through the sand core of the G3 crucible filter 1 under the action of vacuum negative pressure, and washing and desorbing for multiple times by using different solutions according to the operation steps of the polyamide adsorption method to complete the pre-detection treatment work of the synthetic pigment solution to be detected.

In the comparison of NIFDC-PT-156 survey of lemon yellow in beverage of the national food inspection detection mechanism of 2018 institute of China food and drug verification institute organization, obtained 163 family's laboratory's lemon yellow content testing data altogether, wherein used the utility model discloses the survey that the device obtained reports the value and is 0.144g/Kg, and the last appointed value of this comparison is 0.144g/Kg, promptly through using the utility model discloses the Z value (the error) of measured value in the comparison of examination centering that obtains is 0, the statistical summary table of testing result is shown in Table 1.

Among 163 detection mechanisms with feedback results, the detection results of 16 laboratories were unsatisfactory, the detection results of 8 laboratories were suspect, the detection results of 139 laboratories were satisfactory, and only 20 detection mechanisms with Z value of 0 were examined.

And simultaneously, use the utility model discloses the device melts the funnel with G3 hanging down, does not have the G3 crucible formula filter of preventing the pump loss pipe, carries out the lemon yellow and detects the pretreatment suction filtration device and draws the effect and compare, and concrete effect sees that table 2 shows.

Can be obtained by contrast test, the utility model discloses the device draws the effect best.

Therefore, the utility model relates to a rationally, the pretreatment is drawed completely, can regard as the effective replenishment of polyamide adsorption method in GB 5009.35-2016 synthetic colorant's survey in the national standard food of food safety, convenient to use, simple has important realistic meaning to the accurate synthetic colorant of survey.

It should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art will understand that modifications and equivalent substitutions can be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and all of them shall fall within the scope of the claims of the present invention.

Claims (5)

1. The utility model provides a special suction filter device of synthetic pigment before detecting processing which characterized in that: including crucible formula filter (1), prevent pump loss pipe (6), buchner flask (8), safe cushion flask (9), vacuum pump (5), crucible formula filter (1) export with prevent pump loss pipe (6) upper end sealing connection, prevent that pump loss pipe (6) lower extreme stretches into in buchner flask (8), prevent pump loss pipe (6) pipe shaft outer wall with the bottleneck sealing connection of buchner flask (8), the side opening of buchner flask (8) passes through vacuum tube A (7) and hollow glass return bend (2) sealing connection, hollow glass return bend (2) are run through from rubber stopper (3) middle part top-down and are passed through, rubber stopper (3) seal the setting is in the bottleneck of safe cushion flask (9), safe cushion flask (9) side opening pass through vacuum tube B (4) with vacuum pump (5) sealing connection.

2. The suction filtration apparatus special for the pretreatment of detection of a synthetic pigment according to claim 1, wherein: the specification of the crucible type filter (1) is G3.

3. The suction filtration apparatus special for the pretreatment of detection of a synthetic pigment according to claim 1, wherein: the pumping loss prevention pipe (6) is made of polyethylene plastic, and the surface of the pipe body is of a frosted structure.

4. The suction filtration apparatus special for the pretreatment of detection of a synthetic pigment according to claim 1, wherein: the inner wall of the mouth of the suction filtration bottle (8) and the outer wall of the outlet of the crucible type filter (1) are both of frosted structures.

5. The suction filtration apparatus special for the pretreatment of detection of a synthetic pigment according to claim 1, wherein: the vacuum tube A (7) and the vacuum tube B (4) are made of latex materials.

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