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Titration end point determination device for determining fatty acid value of grain

A technology of fatty acid value and titration end point, which is applied in the direction of material analysis by observing the influence of chemical indicators, and analysis by making materials undergo chemical reactions, so as to achieve the effects of accurate judgment, low cost and simple device structure

Active Publication Date: 2011-06-22
NANJING UNIV OF FINANCE & ECONOMICS
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems existing in the determination of the titration end point in the determination of the fatty acid value of grains in the background technology, and provide a device that can accurately determine the titration end point in the determination of the fatty acid value of grains

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  • Titration end point determination device for determining fatty acid value of grain
  • Titration end point determination device for determining fatty acid value of grain
  • Titration end point determination device for determining fatty acid value of grain

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Embodiment Construction

[0020] A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

[0021] Such as Figure 1 ~ Figure 3 Shown: an automatic titration end point determination device for the determination of grain fatty acid value, including: a housing 1, a burette 2, a titration cup 3, a magnetic stirrer 4, a stirrer 5, a light source 6, and a photosensitive element 7.

[0022] The titration cup 3 adopts a 100mL transparent glass beaker.

[0023] The housing 1 is a cuboid containing a cylindrical through hole, which can be made of cuboid opaque plastic, and the inner diameter of the middle cylindrical through hole is 2 mm larger than the outer diameter of the titration cup 3 .

[0024] The light source 6 adopts two high-power white LEDs with a color temperature of 5500-6500K and a power dissipation of 1W, which are relatively placed on the wall of the housing 1; the photosensitive element 7 adopts a color sensor, the model of which is ...

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Abstract

The invention relates to a titration end point determination device for determining a fatty acid value of grain, which comprises a shell, a burette, a titration cup, a magnet stirrer, a stir bar, a light source and a light sensing element, and is characterized by also comprising a constant flow source circuit and a singlechip, wherein, the light source is connected with the constant flow source circuit; the light sensing element is connected with the singlechip; the shell is in a cuboid shape with a cylindrical through hole; the titration cup is transparent cylindrical glass, and is placed inthe shell; the light source is a high-power white light-emitted diode (LED); the light sensing element is a color sensor; and the LED and the color sensor are arranged on the inner wall of the shell at a 90-degree interval. Compared with the prior art, the device provided by the invention has the advantages of adopting the high-power white LED as the light source, needing no measurement darkroom,adopting the color sensor to detect the solution color, and automatically determining the titration end point by the singlechip, having simple structure and low cost, being matched with manual titration for use, and being beneficial for promotion and popularization.

Description

technical field [0001] The invention relates to a titration endpoint judging device, in particular to a titration endpoint judging device for measuring the fatty acid value of grains. Background technique [0002] In the process of grain storage, its quality changes with the storage time or poor storage, from new grain to aged grain gradually. The quality index of grain storage in my country (suitable for storage, slightly unsuitable for storage, and severe unsuitable for storage) is mainly based on the fatty acid value. determination. The current national standards GB / T20569-2006 and GB / T 20570-2006 (issued in November 2006) stipulate that the value of fatty acid is represented by "the number of milligrams of potassium hydroxide required to neutralize the free fatty acid in 100g dry matter sample", and its The determination method is as follows: ① pulverize the sample, extract the fatty acid with absolute ethanol to obtain the extract; ② add phenolphthalein indicator to the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/79
Inventor 李耀杨慧萍章磊刘甲宾宋伟
Owner NANJING UNIV OF FINANCE & ECONOMICS
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