CN211318196U

CN211318196U - Portable aflatoxin detector

Info

Publication number: CN211318196U
Application number: CN201922294623.5U
Authority: CN
Inventors: 刘震营; 张永清
Original assignee: Shandong University of Traditional Chinese Medicine
Current assignee: Shandong University of Traditional Chinese Medicine
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-08-21
Anticipated expiration: 2029-12-19

Abstract

The utility model belongs to the technical field of food safety, in particular to a portable aflatoxin detector, which comprises a gun-shaped handle, wherein the gun-shaped handle comprises a vertical arm and a transverse arm connected with the vertical arm, and a display screen is arranged at the upper end of the vertical arm; the gun-shaped handle is provided with a button; a cavity is arranged in the cross arm, and an ultraviolet lamp, a charge-coupled device and an embedded sample box are arranged in the cavity; one end of the ultraviolet lamp is connected with the button through a circuit, and the other end of the ultraviolet lamp is connected with the charge coupled device through a circuit; the charge coupled device is connected with the display screen through a circuit; and an adjusting key is arranged below the display screen. Based on there is corresponding linear relation between aflatoxin concentration and the ultraviolet fluorescence, utilize the ultraviolet irradiation method, the utility model discloses research and developed the instrument that can detect aflatoxin's content by quick convenient method. The instrument has a simple structure and is convenient to operate, and the working efficiency of detecting the aflatoxin in the sample is improved.

Description

Portable aflatoxin detector

Technical Field

The utility model relates to a food safety technical field especially relates to an aflatoxin detector.

Background

Aflatoxins (AFT) are a class of compounds with similar chemical structures, all of which are derivatives of dihydrofurocoumarins. Aflatoxins are secondary metabolites produced primarily by aspergillus flavus, aspergillus parasiticus. The phenomenon that traditional Chinese medicinal materials pollute aflatoxin is increasing, and the control of the aflatoxin by using effective measures is a key link. At present, aflatoxin is mostly detected by a high performance liquid chromatography or a liquid chromatography-mass spectrometry at an experimental center or a detection center, purification is carried out by an immunoaffinity column at the early stage, derivatization treatment is carried out before or after the column, and the steps are complex. Based on the corresponding linear relation between the aflatoxin concentration and the ultraviolet fluorescence, the aflatoxin concentration of the detection sample can be calculated according to the corresponding fluorescence value. Therefore, research and development of a method capable of quickly and conveniently detecting the content of aflatoxin have important significance to production and life.

Disclosure of Invention

To the problem, the utility model provides a portable aflatoxin detector. And calculating the concentration of the aflatoxin of the detection sample according to the corresponding fluorescence value based on the corresponding linear relation between the concentration of the aflatoxin and the ultraviolet fluorescence.

A portable aflatoxin detector comprises a gun-shaped handle, wherein the gun-shaped handle comprises a vertical arm and a cross arm connected with the vertical arm, and a display screen is arranged at the upper end of the vertical arm; the gun-shaped handle is provided with a button; a cavity is arranged in the cross arm, and an ultraviolet lamp, a charge-coupled device and an embedded sample box are arranged in the cavity; one end of the ultraviolet lamp is connected with the button through a circuit, and the other end of the ultraviolet lamp is connected with the charge coupled device through a circuit; the charge coupled device is connected with the display screen through a circuit; and an adjusting key is arranged below the display screen.

Preferably, the ultraviolet lamps are respectively positioned above and below the embedded sample box, and the sample box can be drawn out or embedded into a cavity at the detection end of the cross arm of the gun-shaped handle. The ultraviolet fluorescence captured by the charge coupler can be more accurate by irradiating the sample by the two ultraviolet lamps.

Preferably, a menu key and a detector switch are arranged around the display screen. The menu key is used for switching numerical value adjustment, such as the adjustment of an early warning lamp numerical value and the adjustment of ultraviolet light wavelength. The detector switch is a power switch.

Preferably, the lower end of the embedded sample box is provided with a temperature sensor and a humidity sensor; the two are used for detecting the condition of the stored materials in the warehouse. The instrument can also control variables, set the temperature to a fixed value and detect the concentration of aflatoxin in samples with different humidity; or setting the humidity to a fixed value and comparing the temperature. The temperature or the humidity can be controlled according to the relationship between the two to reduce the growth of the aflatoxin.

Preferably, a memory card placing position, a memory card rear cover and a USB port are arranged on the gun-shaped handle. Data may be output if necessary. The instrument is convenient and quick, the most important is small volume and convenient carrying, a grower can directly go to a field or a warehouse to detect the content of the aflatoxin on site, and a sample can be directly measured without a complex pretreatment link.

Preferably, the handle is provided with a threshold early warning lamp. Setting a threshold according to related national standards, setting a corresponding national limit standard of a sample before measurement, and if the measurement result exceeds the threshold, indicating that the content of aflatoxin in the test sample exceeds the standard, and lighting a warning lamp in an instrument to be red; if the threshold value is not exceeded, the early warning lamp is turned on in green.

To sum up, the utility model discloses following beneficial effect has:

1. simple structure convenient operation has improved the work efficiency to aflatoxin detection in the sample. Different from most aspergillus flavus detection, the portable aspergillus flavus detection instrument can be carried about without pretreatment of samples, and can quickly detect required data.

2. By adopting a single quantity detection method, the method can quickly know the relationship between the temperature and the humidity of two factors which have great influence on the content of the aflatoxin by means of an instrument, and the factor with the largest influence is analyzed by using a control variable method for control. The method is suitable for controlling the environmental variables in a large-scale cold storage and is also suitable for workshops which cannot control the environmental variables comprehensively, the humidity can be controlled according to the local temperature or the temperature can be controlled according to the humidity, and one of the humidity and the humidity is selected to be controlled under the condition of economic allowance, so that the content of the aflatoxin is reduced to the minimum.

3. Can be memorized and stored. The instrument can be used for memorizing and storing, not only can be used for storing the linear relation of different fluorescence values, but also can be used for storing a certain amount of concentration data and exporting the data through a USB port.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the connection structure of the components of the present invention.

In the figure, 1 ultraviolet lamp tube, 3 sample box, 4 temperature sensor, 5 humidity sensor, 6 button, 7 handle, 8USB interface, 9 memory card place, 10 memory card back cover, 11 detector switch, 12 menu key, 13 up-down adjusting key, 14 display screen, 15 early warning lamp, 16 inductive coupling device (CDD), 17 cross arm, 18 cavity, 19 vertical arm.

Detailed Description

The present invention will be further described with reference to the following specific embodiments.

The ultraviolet lamps are respectively positioned above and below the embedded sample box.

And a menu key and a detector switch are arranged below the display screen.

And the bottom end of the sample box is provided with a temperature sensor and a humidity sensor.

The gun-shaped handle is provided with a memory card placing position, a memory card rear cover and a USB port.

And a threshold early warning lamp is arranged on the gun-shaped handle.

Referring to fig. 1, a sample with a certain mass is weighed and placed in a sample box, ultraviolet lamps above and below the sample box are controlled by buttons to emit ultraviolet light, the sample to be detected is irradiated, and then an optical signal is converted into an electrical signal, namely a specific fluorescence value, through a charge-coupled device. Before the instrument is used, an ultraviolet spectrophotometer can be used for detecting samples to be detected with different known concentrations, specific fluorescence values are obtained, the linear relation between the concentrations and the fluorescence values is calculated, and then the linear relation is led into the instrument with the memory function. The content of the aflatoxin in the sample to be detected can be calculated according to the reference curve after the sample to be detected is converted into the electric signal of the fluorescence value, and then the aflatoxin is displayed on a screen through a digital display system.

Claims

1. The utility model provides a portable aflatoxin detector, includes gun type handle (7), gun type handle (7) including perpendicular arm (19) and xarm (17) of being connected with perpendicular arm (19), its characterized in that: the upper end of the vertical arm (19) is provided with a display screen (14); a button (6) is arranged on the gun-shaped handle (7); a cavity (18) is arranged in the cross arm, and an ultraviolet lamp (1), a charge-coupled device (16) and an embedded sample box (3) are arranged in the cavity (18); one end of the ultraviolet lamp (1) is connected with the button (6) through a circuit, and the other end of the ultraviolet lamp is connected with the charge-coupled device (16) through a circuit; the charge coupled device (16) is connected with the display screen (14) through a circuit; an adjusting key (13) is arranged below the display screen (14).

2. The portable aflatoxin detector of claim 1 wherein the ultraviolet lamp (1) is located above and below the embedded sample cartridge (3) respectively.

3. The portable aflatoxin detector of claim 1 wherein a menu key (12) and a detector switch (11) are provided under the display screen (14).

4. The portable aflatoxin detector of claim 1, wherein the bottom end of the sample box (3) is provided with a temperature sensor (4) and a humidity sensor (5).

5. The portable aflatoxin detector of claim 1, wherein the gun-shaped handle (7) is provided with a memory card placing part (9), a memory card rear cover (10) and a USB port (8).

6. The portable aflatoxin detector of claim 1 wherein a threshold warning light (15) is provided on the gun-shaped handle (7).