WO2010094167A1 - 掺假花生油检测仪及一种掺假花生油检测方法 - Google Patents

掺假花生油检测仪及一种掺假花生油检测方法 Download PDF

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Publication number
WO2010094167A1
WO2010094167A1 PCT/CN2009/001395 CN2009001395W WO2010094167A1 WO 2010094167 A1 WO2010094167 A1 WO 2010094167A1 CN 2009001395 W CN2009001395 W CN 2009001395W WO 2010094167 A1 WO2010094167 A1 WO 2010094167A1
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WIPO (PCT)
Prior art keywords
peanut oil
module
detection
detecting
adulterated
Prior art date
Application number
PCT/CN2009/001395
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English (en)
French (fr)
Inventor
于爱民
王振德
Original Assignee
长春吉大·小天鹅仪器有限公司
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Application filed by 长春吉大·小天鹅仪器有限公司 filed Critical 长春吉大·小天鹅仪器有限公司
Priority to US13/056,891 priority Critical patent/US20110134423A1/en
Publication of WO2010094167A1 publication Critical patent/WO2010094167A1/zh
Priority to US15/228,363 priority patent/US20170030879A1/en
Priority to US15/228,350 priority patent/US10067110B2/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/02—Food
    • G01N33/03—Edible oils or edible fats
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/27—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/28—Investigating the spectrum
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N2021/1748—Comparative step being essential in the method
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2201/00—Features of devices classified in G01N21/00
    • G01N2201/06—Illumination; Optics
    • G01N2201/062—LED's
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2201/00—Features of devices classified in G01N21/00
    • G01N2201/12—Circuits of general importance; Signal processing
    • G01N2201/13—Standards, constitution

Definitions

  • the invention belongs to the technical field of product analysis, and relates to a simple, sensitive and on-the-spot rapid detection instrument for detecting adulterated peanut oil, and particularly relates to the use of rapeseed oil, sunflower oil, corn oil, cottonseed oil and palm oil in the peanut oil.
  • Peanut oil is known for its nutrient-rich and is one of the most expensive edible oils on the market. Under normal circumstances, peanut oil is light yellow, transparent, bright color, fragrant smell, delicious taste, is a relatively easy to digest edible oil. More than 80% of unsaturated fatty acids (including oleic acid 41.2%, linoleic acid 37.6%) in peanut oil. It also contains saturated fatty acids such as palmitic acid, stearic acid and arachidic acid. In addition, peanut oil also contains alcohol, steulin, pity, vitamin E, choline and other substances beneficial to the human body. It can be seen from the above data that the fatty acid composition of peanut oil is relatively easy to be digested and absorbed by the human body.
  • peanut oil According to foreign data, regular consumption of peanut oil can not only decompose cholesterol in the body into bile acids and excrete it, thereby lowering the plasma cholesterol content. It also prevents aging of the skin, protects the blood vessel wall, prevents the formation of blood plugs, and helps prevent arteriosclerosis and coronary heart disease. Choline in peanut oil can also improve the memory function of the human brain and delay the decline of brain function. From this point of view, peanut oil is an edible oil that is very beneficial to human health. Due to the interests driven, peanut oil is often banned.
  • the adult peanut oil detecting instrument has a casing, and the surface of the casing is provided with a liquid crystal display, a return key, a confirmation key, a up key, a down key, a power control switch, and a power supply.
  • the socket and the USB interface are provided with a micro-device and a power source electrically connected to the surface components, and a module cover is arranged on the upper surface of the casing, and a pre-processing module and a detection are installed in the lower space of the module cover in the casing Module.
  • the pretreatment module includes a main body and a heating body attached to the bottom thereof, and two upwardly open cuvette holes are formed in the main body, and a temperature sensor is disposed on the side; Both the body and temperature sensors are electrically coupled to the microprocessor and power supply.
  • the detection module includes an axial fan, a heat sink, a cooling fin and a detecting module body from the bottom to the top, and a temperature sensor is attached to the detecting module main body; and two upward opening ratios are vertically opened in the detecting module main body a color dish slot, and two horizontal through holes are formed in the hole of the cuvette hole, a light source/monochromator is installed at one end of the through hole, and a photodetector is installed at the other end of the through hole; the axial flow fan and the heat dissipation in the detecting module
  • the chip, the cooling plate, the temperature sensor, the light source/monochromator, and the photodetector are all electrically connected to the power source and the microprocessor.
  • the bottom of the casing is provided with a ventilation hole.
  • a printer is disposed in the casing, and a paper outlet of the printer is disposed on the upper surface of the casing, and the printer is electrically connected to the power source and the microprocessor.
  • Another object of the present invention is to provide a method for detecting adulterated peanut oil.
  • the cuvette containing the sample to be inspected is placed in a pretreatment module and heated at a constant temperature of 40 ° C for 10 minutes, and then the cuvette containing the sample to be inspected is taken out and placed in a constant temperature 3 -
  • the detection is performed in the 4 °C detection module; the detection time is 25 minutes.
  • the detection signal is generated by the microprocessor to generate a detection curve.
  • the microprocessor compares the detection curve with the standard curve in the standard curve library to output the detection result.
  • the standard curve includes a standard curve of genuine peanut oil and a standard curve of peanut oil of various adulteration ratios.
  • the test result is whether the sample to be tested is a ratio of true peanut oil and adulterated peanut oil.
  • the test results are output via the LCD, USB interface or printer.
  • the invention adopts the above technical solution, and its remarkable features are:
  • the invention can quickly detect the quality and safety of peanut oil products. On-site rapid detection of rapeseed oil, sunflower oil, corn oil, cottonseed oil, palm oil and soybean oil can be carried out on peanut oil. DRAWINGS
  • Fig. 1 is a schematic view showing the external structure of the host of the adulterated peanut oil detector of the present invention.
  • FIG. 2 is a schematic structural view of a pre-processing module in the present invention.
  • FIG. 3 is a schematic structural view of a detecting module in the present invention.
  • 3A is a schematic left side cross-sectional structural view of the main structure of the detecting module of FIG. 3.
  • FIG. 4 is a schematic diagram of the circuit, the optical path connection relationship and the working principle of the working component in the present invention.
  • Fig. 5 is a graph showing the standard of photometric analysis of true peanut oil (genuine) in the microprocessor of the present invention. detailed description
  • the instrument and method for detecting adulterated peanut oil proposed by the invention is based on an analytical instrument which is different in the solidification temperature of the peanut oil in the sample and the solidification temperature of other edible oils to be incorporated, resulting in different degrees of light transmission, that is, different absorbances. .
  • the adulterated peanut oil detector of the present invention has a casing 1, and the upper surface of the casing 1 is provided with a liquid crystal display 3, a return button 41, a confirm button 42, a flip button 43, and a down button 44.
  • the module cover 2 and the printer paper exit 5 are also provided on the upper surface of the casing, and the power control switch 6 is provided on the side of the casing 1.
  • the power socket 7 and the USB interface 8 are provided with ventilation holes at the bottom of the casing (not shown).
  • the casing 1 is provided with a space and is equipped with a microprocessor, a printer and a power supply (see Fig. 4); wherein the lower space of the module cover 2 is used to mount the pre-processing module 20 and the detection module 30.
  • the main body 21 of the pre-processing module 20 is made of a metal aluminum material, and a PTC heating body 22 is attached to the bottom thereof.
  • a temperature sensor 23 is mounted on the side thereof, and the temperature sensor model is 18B20, which can also have the same effect.
  • the heating body or temperature sensor is not particularly limited herein; both the heating body 22 and the temperature sensor 23 are electrically connected to the microprocessor and the power source.
  • Two upwardly open cuvette apertures 241 and 242 are formed in the body 20, the apertures 241 and 242 being sized and shaped to match the cuvette used in the assay.
  • the detection module 30 of the present invention includes an axial flow fan 31, a heat sink 32, a cooling fin 34, and a detection module body 33 of a metal aluminum material from the bottom to the top, on the detection module main body 33,
  • a temperature sensor (18B20) 35 is provided; in the present invention, the temperature sensor, the cooling fin, the heat sink, and the axial flow fan are standard general-purpose products, and as long as the whole is matched and can satisfy the performance, no special limitation is imposed here.
  • System In the detecting module main body 33, two upwardly opening cuvette holes 333, 334 are vertically opened, and the size and shape of the cuvette hole are matched with the cuvette used in the detection; as shown in FIG.
  • the detecting module main body 33 In the detecting module main body 33, two through holes intersecting the cuvette holes 333 and 334 are horizontally opened, and the light source/monochromator 332 and 335 are disposed at one end of the through hole, and the photodetectors 336 and 331 are disposed at the other end of the through hole. .
  • the axial fan 31, the heat sink 32, the cooling fins 34, the temperature sensor 35, the light source/monochromator 332, 335, and the photodetectors 336, 331 are all electrically connected to the power source 35 and the microprocessor.
  • the cooling fins 34 start to cool, and the generated heat is transferred to the fins 32, and the heat is dissipated by the axial fan 31; the temperature value of the detecting module main body 33 is transmitted to the microprocessor through the temperature sensor 35, The microprocessor controls the detection module body 33 at 3-4 °C.
  • the light source/monochromator 332, 335 serves as a light source of the analytical instrument, and the light passes through the cuvette to reach the photodetector 336, 331, and the photodetector receives the optical signal from the light source/monochromator and transmits it to the microprocessor. .
  • the circuit, optical path connection relationship and working principle between the working parts of the present invention are described: After the instrument is powered on, the sample to be tested is loaded into the cuvette, and the cuvette is placed in the cuvette of the pre-processing module. In the slot, the microprocessor controls the pre-processing module to start heating, keeping the sample at a constant temperature of 40 ° C (through the heating body and temperature sensor); then placing the cuvette containing the sample into the cuvette slot of the detection module The microprocessor controls the temperature of the main body of the module, and keeps the sample at 3-4 °C (through the axial fan, heat sink, cooling fin and temperature sensor); when detecting, the monochromatic light emitted by the light source/monochromator After passing through the sample of the cuvette in the main body of the module, the photodetector is irradiated to the photodetector, and the photodetector converts the detected optical signal into an electrical signal, and then transmits it to the microprocessor, performs data analysis through
  • the light source/monochromator is a certain number of super bright LEDs, which are both a light source and a monochromator.
  • a super bright LED produced by Nichia and Toyota of Japan is used, and the brightness parameter is used. Above lOOOmcd.
  • the wavelengths are 420 nm.
  • the light source/monochromator is powered continuously or pulsed. This circuit is a conventional circuit and will not be described in detail herein.
  • the photoelectric detector adopts the integrated photoelectric sensor produced by TI Company of USA, and the model is TSL230 series.
  • the utility model can also adopt other integrated photoelectric sensors with equivalent functions.
  • the microprocessor is an ARM series manufactured by Philips. Its main parameters are 32-bit microcontrollers, internal memory 40K, and commonly used spectrophotometric analysis software.
  • the microprocessor mainly receives the output signal of the photodetector and performs data processing.
  • the circuit connection and working process of the spectrophotometer with the light source/monochromator, photodetector and microprocessor as the core components can be referred to the applicant's previous introduction of ZL200620004295.0, and will not be repeated here.
  • the cuvette containing the sample to be inspected is placed in a pretreatment module and heated at a constant temperature for 10 minutes, in order to achieve consistency in sample detection. Then take out the cuvette containing the sample to be tested and put it into the constant temperature 3-4 °C detection module for testing.
  • the detection time is 25 minutes.
  • the photodetector transmits the detection signal to the microprocessor without interruption to generate a detection curve (absorbance-time curve).
  • the standard curve in the standard curve library see Figure 5
  • the various adulterated ratio peanut oil curves are compared to determine the ratio of the true and false peanut oil to the peanut oil and output through the display, printer or USB interface. .
  • the data acquisition and processing process is done automatically by the microprocessor. Industrial applicability
  • the pseudo-peanut oil detector of the invention has compact structure and can be used for rapid detection of the quality and safety of peanut oil products, and can be quickly added to the peanut oil by mixing rapeseed oil, sunflower oil, corn oil, cottonseed oil, palm oil and soybean oil. Testing, suitable for industrial applications.

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Description

掺假花生油检测仪及一种掺假花生油检测方法 技术领域
本发明属于产品分析技术领域， 涉及一种简便、 灵敏、 现场检测掺假花生油 的快速检测仪器， 具体涉及用于现场对花生油中掺入菜籽油、 葵花油、 玉米油、 棉籽油、 棕榈油与大豆油进行快速检测的一种分析仪器及检测方法。 背景技术
花生油以营养丰富而著称， 在市场上属于价格最高的食用油之一。在正常情 况下， 花生油呈淡黄色、 透明， 色泽清亮， 气味芬芳， 滋味可口， 是一种比较容 易消化的食用油。 在花生油中含 80%以上的不饱和脂肪酸 （其中含油酸 41. 2%， 亚油酸 37. 6%)。 而且还含有软脂酸， 硬脂酸和花生酸等饱和脂肪酸 。 另外， 花生油中还含有 醇、 麦胚酚、 憐脂、 维生素 E、 胆碱等对人体有益的物质。 由 上述数据可知， 花生油的脂肪酸构成是比较易于人体消化吸收的。据国外资料介 绍， 经常食用花生油， 不但可以使人体内胆固醇分解为胆汁酸并排出体外， 从而 降低血浆中胆固醇的含量。而且还可以防止皮肤皱裂老化， 保护血管壁， 防止血 栓形成， 有助于预防动脉硬化和冠心病。 花生油中的胆碱， 还可改善人脑的记忆 力功能， 延缓脑功能衰退。 由此看来， 花生油是一种对人体健康非常有益的一种 食用油。 由于利益驱动， 花生油掾假屡禁不止。
花生油、 菜籽油与棕榈油、 大豆油之间的巨额差价（目前广州市场上 1吨花 生油价格约人民币 10250元， 大豆油价格 5400元， 菜籽油的价格为 6150元， 棕 榈油价格为 4380元） 给了不法商家可乘之机， 不法之徒在花生油中掺入其它植 物油， 甚至全部以其他植物油代替， 只以微量花生油香精调香， 而这些掺假的花 生油用通常的鼻闻和冷藏法难以鉴别， 因此，研制一种可以鉴别掺假花生油的检 测仪非常必要。 发明内容
针对上述问题， 本发明的主要目的是提供一种可以简便、 快速、 现场检测掺 假花生油的快速分析仪器。
为实现上述目的， 本发明提供的掺假花生油检测仪， 具有机壳， 机壳表面 设置有液晶显示屏、 返回键、 确认键、 上翻键、 下翻键， 电源控制开关、 电源 插座和 USB接口， 机壳内装设有与表面各部件电连接的微处'理器和电源， 所述 机壳上表面还设置模块盖， 机壳内模块盖下部空间安装有前处理模块和检测模 块。
上述掺假花生油检测仪中，所述前处理模块包括一主体及附于其底部的一加 热体， 所述主体上开设两个向上开口的比色皿孔槽， 侧面装设一温度传感器； 加 热体和温度传感器均与微处理器和电源电相连。
所述检测模块由下至上包括一轴流风机、一散热片、一制冷片和一检测模块 主体， 检测模块主体上， 另附设一温度传感器； 检测模块主体中， 纵向开设两个 向上开口的比色皿孔槽， 并水平开设两个与比色皿孔槽相交的通孔， 通孔一端装 设光源 /单色器， 通孔另一端装设光电检测器； 检测模块中轴流风机、 散热片、 制冷片、 温度传感器、 光源 /单色器和光电检测器均与电源和微处理器电相连。
所述机壳底部设有通风孔。
所述机壳内装设一打印机， 打印机出纸口设于机壳上表面， 打印机与电源和 微处理器电相连。
本发明另一目的在于提供一种掺假花生油检测方法。
该方法， 使用上述掺假花生油检测仪， 首先将装有待检样品的比色皿放入前 处理模块中 40°C恒温加热 10分钟，然后取出装有待检样品的比色皿放入恒温 3-4 °C检测模块中进行检测； 检测时间 25分钟， 检测期间， 检测信号通过微处理器 生成检测曲线， 由微处理器将检测曲线与标准曲线库中标准曲线比对，输出检测 结果。
检测方法中，所述标准曲线包括正品花生油标准曲线以及各种不同掺假比例 花生油标准曲线。
所述检测结果为待检样品是否为真花生油和掺假花生油的比例。检测结果通 过液晶显示屏、 USB接口或打印机输出。
本发明采用上述技术方案， 其显著特点是：
1、 采用标准曲线及标准曲线库比对方法， 使操作简便， 检测结果直观性好。
2、 采用模块化结构， 仪器性能更加稳定。
3、 采用微处理器控制， 具有测量、 设置、 记录、 保存和数据处理功能。 设有 USB接口， 与 PC机联机通信等功能。 自动化程度高。
4、 大屏幕液晶中文显示， 人机交互式操作， 体积小、 重量轻、 使用方便。
本发明可以对花生油产品的质量安全进行快速检测。可对花生油中掺入菜籽 油、 葵花油、 玉米油、 棉籽油、 棕榈油与大豆油等进行现场快速检测。 附图说明
图 1为本发明掺假花生油检测仪主机外部结构示意图。
图 2为本发明中前处理模块结构示意图。
图 3为本发明中检测模块结构示意图。
图 3A为图 3中检测模块主体结构左视剖面结构示意图。
图 4为本发明中工作部件电路、 光路连接关系以及工作原理示意图。
图 5为本发明微处理器中真花生油（正品）光度分析标准曲线图。 具体实施方式
下面结合附图说明本发明的具体实施方式。
本发明提出的掺假花生油检测仪器和方法， 是基于样品中花生油的凝固温度 与其它欲掺入的食用油的凝固温度不同，导致光的透过程度不同即吸光度不同而 建立的一种分析仪器。
如图 1所示， 本发明掺假花生油检测仪具有机壳 1， 机壳 1的上表面设置有 液晶显示屏 3、 返回键 41、 确认键 42、 上翻键 43、 下翻键 44。 机壳上表面还设 置模块盖 2和打印机出纸口 5， 机壳 1侧面设有电源控制开关 6、 电源插座 7和 USB接口 8， 机壳底部设有通风孔 （图中未表示）。 机壳 1 内设有空间并装设有 微处理器、 打印机和电源 （参见图 4所示）； 其中， 模块盖 2下部空间用于安装 前处理模块 20和检测模块 30。
参见图 2所示， 前处理模块 20的主体 21 由金属铝材料制成， 其底部附一 PTC加热体 22， 其侧面装设一温度传感器 23， 温度传感器型号为 18B20, 也可 以为具有同等功效的加热体或温度传感器， 在此不做特别限制； 加热体 22和温 度传感器 23均与微处理器和电源电相连。 在主体 20上开设两个向上开口的 比色皿孔槽 241和 242， 孔槽 241和 242的尺寸大小及形状与检测中使用的比色 皿相配合。 前处理模块 20工作时， 通过加热体 22将主体 21加热， 并通过温度 传感器 23将主体 21的温度数值传递给微处理器， 通过微处理器将主体 21温度 控制在 40°C o
如图 3所示， 为本发明检测模块 30， 由下至上包括一轴流风机 31， 散热片 32, 制冷片 34， 和一金属铝制材料的检测模块主体 33， 在检测模块主体 33上， 另附设温度传感器 （18B20) 35； 在本发明中， 温度传感器、 制冷片、 散热片、 轴流风机为标准通用产品， 只要整体相配合且能满足使用性能， 在此不做特别限 制。 检测模块主体 33中， 纵向开设两个向上开口的比色皿孔槽 333、 334， 比色 皿孔槽的尺寸大小及形状与检测中使用的比色皿相配合； 结合图 3A所示， 在检 测模块主体 33中， 水平开设两个与比色皿孔槽 333、 334相交的通孔， 通孔一端 装设光源 /单色器 332、 335， 通孔另一端装设光电检测器 336、 331。 检测模块 30中， 轴流风机 31、 散热片 32、 制冷片 34、 温度传感器 35、 光源 /单色器 332、 335和光电检测器 336、 331均与电源 35和微处理器电相连。
检测模块 30工作时， 制冷片 34开始制冷， 产生的热量传递给散热片 32， 由轴流风机 31将热量散出； 通过温度传感器 35将检测模块主体 33的温度数值 传递给微处理器， 通过微处理器将检测模块主体 33控制在 3-4 °C。检测时， 光源 /单色器 332、 335作为分析仪器的光源， 光线通过比色皿到达光电检测器 336、 331， 由光电检测器接收光源 /单色器发出的光信号并传递给微处理器。
参见图 4，描述了本发明工作部件之间的电路、光路连接关系以及工作原理： 仪器接通电源后，将待测样品装入比色皿， 比色皿放入前处理模块的比色皿孔槽 中， 微处理器控制前处理模块幵始加热， 保持样品恒温 40°C (通过加热体和温 度传感器）； 然后将装有样品的比色皿放入检测模块的比色皿孔槽中， 微处理器 控制检测模块主体温度， 保持检测时样品在 3-4°C (通过轴流风机、 散热片、 制 冷片和温度传感器）； 检测时， 光源 /单色器发出的单色光穿过测模块主体中比色 皿的样品后照射到光电检测器， 光电检测器将检测到的光信号转换为电信号后， 传输到微处理器，通过微处理器进行数据分析并将结果通过显示屏显示出来或通 过打印机打印出来。
在本发明中， 光源 /单色器为一定数目的超高亮发光二极管， 既做光源又做 单色器， 实施中采用了日本的日亚和丰田公司生产的超高亮发光二极管， 亮度参 数在 lOOOmcd以上。波长分别为 420nm。光源 /单色器采用连续或脉冲方式供电。 该电路为常规电路， 在此不再详述。
光电检测器采用了美国 TI公司生产集成光电传感器， 型号为 TSL230系列。 当然， 本实用新型也可以采用其它具有同等功效的集成光电传感器。
微处理器为飞利浦公司生产的 ARM系列， 其主要参数为 32位单片机， 内 部存储器 40K， 载有常用分光光度分析软件。微处理器主要接收光电检测器的输 出信号并进行数据处理。 以光源 /单色器、 光电检测器和微处理器为核心元件的 分光光度分析仪的电路连接以及工作过程可参考申请人之前 ZL200620004295.0 的介绍， 在此不再贅述。
以下结合具体操作进一步说明利用本发明掺假花生油检测仪进行的掺假花 生油检测的方法。
首先将装有待检样品的比色皿放入前处理模块中 40Ό恒温加热 10分钟， 目 的是为了实现样品检测的一致性。 然后取出装有待检样品的比色皿放入恒温 3-4 °C检测模块中进行检测。 检测时间 25分钟。 检测期间， 随着温度变化， 样品凝 结程度会发生变化， 吸光值会随之改变； 光电检测器将检测信号不间断传递给 微处理器而生成一条检测曲线 （吸光度一时间曲线）， 此曲线与标准曲线库中正 品标准曲线（参见图 5 )及各种不同掺假比例花生油曲线比对， 即可判断此样品 花生油的真假和掺假花生油的比例， 并通过显示屏、 打印机或 USB接口输出。 数据采集及处理过程由微处理器自动完成。 工业应用性
本发明掺假花生油检测仪结构紧凑， 可用于对花生油产品的质量安全进行 快速检测， 对花生油中掺入菜籽油、 葵花油、 玉米油、 棉籽油、 棕榈油与大豆 油等能进行现场快速检测， 适于工业应用。

Claims

权 利 要 求
1、 一种掺假花生油检测仪， 具有机壳， 机壳表面设置有液晶显示屏、 返回 键、 确认键、 上翻键、 下翻键， 电源控制开关、 电源插座和 USB接口， 机壳内 装设有与表面各部件电连接的微处理器和电源， 其特征在于： 所述机壳上表面还 设置模块盖， 机壳内模块盖下部空间安装有前处理模块和检测模块。
2、 如权利要求 1所述掺假花生油检测仪， 其特征在于： 所述前处理模块包 括一主体及附于其底部的一加热体， 所述主体上开设两个向上开口的比色皿孔 槽， 侧面装设一温度传感器； 加热体和温度传感器均与微处理器和电源电相连。
3、 如权利要求 1或 2所述掺假花生油检测仪， 其特征在于： 所述检测模块 由下至上包括一轴流风机、 一散热片、一制冷片和一检测模块主体， 检测模块主 体上， 另附设一温度传感器； 检测模块主体中， 纵向开设两个向上开口的比色皿 孔槽， 并水平开设两个与比色皿孔槽相交的通孔， 通孔一端装设光源 /单色器， 通孔另一端装设光电检测器； 检测模块中轴流风机、 散热片、 制冷片、 温度传感 器、 光源 /单色器和光电检测器均与电源和微处理器电相连。
4、 如权利要求 3所述掺假花生油检测仪， 其特征在于： 所述机壳底部设有 通风孔。
5、 如权利要求 3所述掺假花生油检测仪， 其特征在于： 所述机壳内装设一 打印机， 打印机出纸口设于机壳上表面， 打印机与电源和微处理器电相连。
6、 一种掺假花生油检测方法， 使用权利要求 1至 5任一所述掺假花生油检 测仪， 首先将装有待检样品的比色皿放入前处理模块中 40°C恒温加热 10分钟， 然后取出装有待检样品的比色皿放入恒温 3-4°C检测模块中进行检测； 检测时间 25 分钟， 检测期间， 检测信号通过微处理器生成检测曲线， 由微处理器将检测 曲线与标准曲线库中标准曲线比对， 输出检测结果。
7、 根据权利要求 6所述掺假花生油检测方法， 其特征在于， 所述标准曲线 包括正品花生油标准曲线以及各种不同掺假比例花生油标准曲线。
8、 根据权利要求 6所述掺假花生油检测方法， 其特征在于， 所述检测结果 为待检样品是否为真花生油和掺假花生油的比例。
9、 根据权利要求 6或 7或 8所述掺假花生油检测方法， 其特征在于， 检测 结果通过液晶显示屏、 USB接口或打印机输出。
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