An Optical Microscopy Technique for Determining Solubility Curves of Solution Crystal Growth

Abstract

The invention relates to an optical microscopic technology for determining the solution crystal growth solubility curve. The optical microscopic technology uses a miniature solution crystal growth device to determine the solution crystal growth solubility curve. The device comprises a crystal growth tank and a growth tank temperature controller; and an air inlet, an air outlet, and a feed hole are arranged in the crystal growth tank. The technology comprises the following steps: at first, weighing a proper amount of crystal growth solution at a room temperature, then adding the weighed crystal growth solution into the crystal growth tank of the miniature solution crystal growth device; weighing a certain amount of crystal, adding the weighed crystal into the crystal growth tank from the feed hole; after the crystal is fully dissolved, slowly raising the temperature in the crystal growth tank by the growth tank temperature controller, and observing the situation of crystal dissolution in the crystal growth tank through a microscope at the same time. In the provided technology, the crystal growth device and microscopic technology are combined together, the operation is simple, the observation is convenient, the precision is high, and thus the technology is suitable for measuring crystals in inorganic solution, organic solution and inorganic-organic mixed solution.

Description

technical field [0001] The invention relates to an optical microscopic technique for determining the solubility curve of solution crystal growth, which is a method combining the optical microscopic technique with a miniature solution crystal growth device, and belongs to the field of optical technology. Background technique [0002] The temperature at which the solution reaches saturation, that is, the temperature at which the solute solid and the solution reach equilibrium is called the saturation temperature of the solution. Accurate measurement of the saturation temperature of the solution is the basis for determining the solubility curve of crystal growth in the solution, so the determination of the saturation temperature is a basic work for growing crystals from the solution. The commonly used methods for determining the saturation temperature are the equilibrium method, the concentration eddy current method and the optical effect method. The equilibrium method refers ...

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Problems solved by technology

[0003] The purpose of the present invention is to aim at the low precision that occurs in the method (equilibrium method, concentration eddy current method and optical effect method) of measurement solution crystal growth solubility curve commonly used, be difficult for naked eye observation and need the problems such as high experimental skill

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