CN201352200Y - Detector for adulterated peanut oil - Google Patents

Abstract

The utility model relates to an adulterated peanut oil detector, which belongs to the field of analytical instruments. It has a casing, and the surface of the casing is provided with a liquid crystal display, a return key, a confirmation key, an up key, a down key, a power control switch, a power socket and a USB interface, and the inside of the casing is provided with a circuit breaker that is electrically connected to each component on the surface. A microprocessor and a power supply, a module cover is arranged on the upper surface of the casing, and a pre-processing module and a detection module are installed in the space under the module cover in the casing. The pretreatment module includes a heating body and a cuvette hole, and the detection module includes an axial flow fan, a cooling fin, a refrigeration sheet and a cuvette hole. The instrument of the utility model can easily and sensitively detect whether peanut oil is adulterated and the proportion of adulteration, and can quickly detect the peanut oil mixed with rapeseed oil, sunflower oil, corn oil, cottonseed oil, palm oil and soybean oil, etc. .

Description

Adulterated peanut oil detector

technical field

The utility model belongs to the field of analytical instruments, and relates to a simple, sensitive, on-site rapid detection instrument for adulterated peanut oil, in particular to an on-site detection of peanut oil mixed with rapeseed oil, sunflower oil, corn oil, cottonseed oil, and palm oil An analytical instrument for rapid detection of soybean oil.

Background technique

Peanut oil is known for being rich in nutrients and is one of the most expensive cooking oils on the market. Under normal circumstances, peanut oil is light yellow, transparent, clear in color, fragrant in smell and delicious in taste. It is a relatively easy-to-digest edible oil. Contain more than 80% unsaturated fatty acids in peanut oil (wherein contain oleic acid 41.2%, linoleic acid 37.6%). It also contains saturated fatty acids such as palmitic acid, stearic acid and arachidic acid. In addition, in peanut oil, also contain the materials useful to human body such as sterol, wheat germ phenol, phosphatide, vitamin E, choline. It can be seen from the above data that the fatty acid composition of peanut oil is relatively easy for the human body to digest and absorb. According to foreign data introduction, often edible peanut oil, not only can make cholesterol in human body be decomposed into bile acid and excrete, thereby reduce the content of cholesterol in blood plasma. But also can prevent wrinkled skin aging, protect blood vessel wall, prevent thrombosis, help to prevent arteriosclerosis and coronary heart disease. Choline in peanut oil can also improve the memory function of human brain and delay brain function decline. From this point of view, peanut oil is a kind of edible oil that is very beneficial to human health. Due to profit-driven, adulteration of peanut oil has been repeatedly banned.

The huge price difference between peanut oil, rapeseed oil, palm oil and soybean oil (currently the price of 1 ton of peanut oil in Guangzhou market is about RMB 10,250, the price of soybean oil is 5,400 yuan, the price of rapeseed oil is 6,150 yuan, and the price of palm oil is 4,380 yuan. Yuan) has given unscrupulous merchants an opportunity to mix other vegetable oils in peanut oil, or even replace them all with other vegetable oils, and only use a small amount of peanut oil essence to spice up. Therefore, it is very necessary to develop a detector that can identify adulterated peanut oil.

Utility model content

In view of the above problems, the main purpose of the utility model is to provide a quick analysis instrument which can detect adulterated peanut oil easily, quickly and on-site.

In order to achieve the above object, the adulterated peanut oil detector provided by the utility model has a casing, and the surface of the casing is provided with a liquid crystal display, a return key, a confirmation key, an up key, a down key, a power control switch, a power socket and A USB interface, a microprocessor and a power supply electrically connected to the components on the surface are installed in the casing, a module cover is provided on the upper surface of the casing, and a pre-processing module and a detection module are installed in the space under the module cover in the casing.

In the above adulterated peanut oil detector, the pretreatment module includes a main body and a heating body attached to its bottom, two cuvette holes opening upwards are set on the main body, and a temperature sensor is installed on the side; Both the body and the temperature sensor are electrically connected to the microprocessor and the power supply.

The detection module includes an axial flow fan, a heat sink, a cooling plate and a detection module body from bottom to top, and a temperature sensor is attached to the detection module body; in the detection module body, there are two ratios with upward openings longitudinally. The cuvette hole slot, and two through holes intersecting with the cuvette hole slot are horizontally opened, the light source/monochromator is installed at one end of the through hole, and the photoelectric detector is installed at the other end of the through hole; the axial flow fan and heat dissipation in the detection module Chip, cooling chip, temperature sensor, light source/monochromator and photodetector are all electrically connected with power supply and microprocessor.

The bottom of the casing is provided with ventilation holes.

A printer is installed in the casing, the paper outlet of the printer is set on the upper surface of the casing, and the printer is electrically connected with the power supply and the microprocessor.

The utility model adopts the above-mentioned technical scheme, and its salient features are:

1. The standard curve and standard curve library comparison method is adopted, which makes the operation easy and the test results are intuitive.

2. Modular structure is adopted, and the performance of the instrument is more stable.

3. It adopts microprocessor control and has the functions of measurement, setting, recording, saving and data processing. Equipped with USB interface, online communication with PC and other functions. high degree of automation.

4. Large-screen liquid crystal display in Chinese, man-machine interactive operation, small size, light weight, easy to use.

The utility model can quickly detect the quality and safety of peanut oil products. It can quickly detect the peanut oil mixed with rapeseed oil, sunflower oil, corn oil, cottonseed oil, palm oil and soybean oil.

Description of drawings

Figure 1 is a schematic diagram of the external structure of the host of the adulterated peanut oil detector of the present invention.

Fig. 2 is a structural schematic diagram of the pre-processing module in the utility model.

Fig. 3 is a schematic structural diagram of the detection module in the present invention.

FIG. 3A is a left-view cross-sectional structural schematic diagram of the main structure of the detection module in FIG. 3 .

Fig. 4 is a schematic diagram of the circuit of the working components, the connection relationship of the optical path and the working principle of the utility model.

Fig. 5 is a standard curve diagram of photometric analysis of real peanut oil (genuine product) in the microprocessor of the present utility model.

Detailed ways

The specific embodiment of the utility model is described below in conjunction with accompanying drawing.

The detection instrument for adulterated peanut oil proposed by the utility model is an analytical instrument established based on the fact that the solidification temperature of the peanut oil in the sample is different from that of other edible oils to be mixed, resulting in a difference in light transmission degree, that is, a difference in absorbance.

As shown in Figure 1, the adulterated peanut oil detector of the utility model has a casing 1, and the upper surface of the casing 1 is provided with a liquid crystal display 3, a return key 41, a confirmation key 42, an up-turning key 43, and a down-turning key 44. The upper surface of the casing is also provided with a module cover 2 and a printer paper outlet 5, and the side of the casing 1 is provided with a power control switch 6, a power socket 7 and a USB interface 8, and the bottom of the casing is provided with ventilation holes (not shown). There is a space inside the casing 1 and a microprocessor, a printer and a power supply (as shown in FIG. 4 ); wherein, the space under the module cover 2 is used for installing the pre-processing module 20 and the detection module 30 .

Referring to Fig. 2, the main body 21 of the pre-processing module 20 is made of metal aluminum, with a PTC heating body 22 attached to its bottom, and a temperature sensor 23 installed on its side. The temperature sensor model is 18B20, and it can also be a The heating body or temperature sensor is not particularly limited here; both the heating body 22 and the temperature sensor 23 are electrically connected to the microprocessor and the power supply. Two upward opening cuvette holes 241 and 242 are provided on the main body 20 , and the size and shape of the cuvettes 241 and 242 match the cuvette used in the detection. When the pre-processing module 20 is working, the main body 21 is heated by the heating body 22, and the temperature value of the main body 21 is transmitted to the microprocessor through the temperature sensor 23, and the temperature of the main body 21 is controlled at 40° C. by the microprocessor.

As shown in Figure 3, it is a detection module 30 of the present invention, which includes an axial flow fan 31 from bottom to top, a cooling fin 32, a cooling fin 34, and a detection module main body 33 of a metal aluminum material, on the detection module main body 33 , additionally set up temperature sensor (18B20) 35; In the utility model, temperature sensor, refrigerating fin, cooling fin, axial flow fan are standard common products, as long as the whole is matched and can satisfy performance, do not do special restriction here. In the detection module main body 33, two upward opening cuvette hole slots 333, 334 are longitudinally provided, and the size and shape of the cuvette hole slots are matched with the cuvette used in the detection; as shown in Fig. 3A, in In the detection module main body 33, two through holes intersecting with the cuvette hole slots 333, 334 are horizontally opened, light sources/monochromators 332, 335 are installed at one end of the through holes, and photodetectors 336, 331 are installed at the other end of the through holes. . In the detection module 30 , the axial fan 31 , cooling fin 32 , cooling fin 34 , temperature sensor 35 , light source/monochromator 332 , 335 and photodetector 336 , 331 are all electrically connected to the power supply 35 and the microprocessor.

When the detection module 30 was working, the cooling plate 34 began to refrigerate, and the heat generated was transferred to the heat sink 32, and the heat was dissipated by the axial fan 31; the temperature value of the detection module main body 33 was passed to the microprocessor by the temperature sensor 35. The microprocessor controls the detection module main body 33 at 3-4°C. During detection, the light source/monochromator 332, 335 is used as the light source of the analytical instrument, and the light passes through the cuvette to the photodetector 336, 331, and the photodetector receives the light signal sent by the light source/monochromator and transmits it to the microprocessor .

Referring to Fig. 4, it describes the circuit, optical path connection relationship and working principle between the working parts of the utility model: after the instrument is powered on, the sample to be tested is packed into a cuvette, and the cuvette is put into the colorimetric cuvette of the pretreatment module. In the cuvette hole, the microprocessor controls the pretreatment module to start heating to keep the sample at a constant temperature of 40°C (through the heating body and temperature sensor); then put the cuvette containing the sample into the cuvette hole of the detection module, The temperature of the main body of the detection module is controlled by the microprocessor, and the sample is kept at 3-4°C during the detection (through the axial flow fan, heat sink, cooling plate and temperature sensor); during the detection, the monochromatic light emitted by the light source/monochromator passes through the measurement The sample in the cuvette in the main body of the module is irradiated to the photoelectric detector, and the photodetector converts the detected light signal into an electrical signal and transmits it to the microprocessor, which performs data analysis and displays the result on the display screen out or print it out on a printer.

In the utility model, the light source/monochromator is a certain number of ultra-bright light-emitting diodes, which are used as light source and monochromator. In the implementation, the ultra-bright light-emitting diodes produced by Nichia and Toyota of Japan are adopted. The parameters are above 1000mcd. The wavelength is 420nm respectively. The light source/monochromator is powered continuously or pulsed. This circuit is a conventional circuit and will not be described in detail here.

The photoelectric detector adopts the integrated photoelectric sensor produced by American TI Company, the model is TSL230 series. Of course, the utility model can also adopt other integrated photoelectric sensors with equivalent efficacy.

The microprocessor is the ARM series produced by Philips. Its main parameters are 32-bit single-chip microcomputer, internal memory 40K, and commonly used spectrophotometric analysis software. The microprocessor mainly receives the output signal of the photodetector and performs data processing. For the circuit connection and working process of the spectrophotometric analyzer with light source/monochromator, photodetector and microprocessor as the core components, please refer to the applicant's previous introduction of ZL200620004295.0, and will not repeat them here.

The method for detecting adulterated peanut oil by using the adulterated peanut oil detector of the utility model is further described below in conjunction with specific operations.

First, put the cuvette containing the sample to be tested into the pretreatment module and heat it at a constant temperature of 40°C for 10 minutes, in order to achieve the consistency of sample detection. Then take out the cuvette containing the sample to be tested and put it into a constant temperature 3-4°C detection module for detection. The detection time is 25 minutes. During the detection period, as the temperature changes, the coagulation degree of the sample will change, and the absorbance value will change accordingly; the photodetector will continuously transmit the detection signal to the microprocessor to generate a detection curve (absorbance-time curve), which is consistent with Comparing the authentic standard curve (see Figure 5) and various adulterated peanut oil curves in the standard curve library, you can judge the authenticity of the sample peanut oil and the ratio of adulterated peanut oil, and output it through the display screen, printer or USB interface . Data acquisition and processing are automatically completed by the microprocessor.

Claims (5)

1, a kind of adulterated peanut oil detector, has casing, the casing surface is provided with LCDs, return key, acknowledgement key, upturning key, downturning key, power control switch, supply socket and USB interface, be equiped with the microprocessor and the power supply that are electrically connected with each parts of surface in the casing, it is characterized in that: described casing upper surface also is provided with module lid, and casing inner module lid lower space is equipped with pre-processing module and detection module.

2, adulterated peanut oil detector according to claim 1 is characterized in that: described pre-processing module comprises a main body and invests a calandria of its bottom that offer the cuvette hole slot of two upward openings on the described main body, a temperature sensor is installed in the side; Calandria all links to each other with the power supply electricity with microprocessor with temperature sensor.

3, adulterated peanut oil detector as claimed in claim 1 or 2, it is characterized in that: described detection module comprises an axial flow blower, a heat radiator, a cooling piece and a detection module main body from the bottom to top, and on the detection module main body, other sets up a temperature sensor; In the detection module main body, vertically offer the cuvette hole slot of two upward openings, and level is offered two through holes that intersect with the cuvette hole slot, through hole one end installing light source/monochromator, through hole other end installing photoelectric detector; Axial flow blower, heat radiator, cooling piece, temperature sensor, light source/monochromator and photoelectric detector all link to each other with the microprocessor electricity with power supply in the detection module.

4, as adulterated peanut oil detector as described in the claim 3, it is characterized in that: described bottom of shell is provided with air vent.

5, as adulterated peanut oil detector as described in the claim 3, it is characterized in that: installing one printer in the described casing, the printer exit slot is located at casing upper surface, and printer links to each other with power supply and microprocessor electricity.

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