Test method for dissolution time of solid powdery substance in solution

A detection method and solution technology, applied in the field of analysis and detection, can solve problems such as no method for measuring dissolution time

Active Publication Date: 2017-11-24
GUANGDONG GUANGHUA SCI TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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  • Test method for dissolution time of solid powdery substance in solution
  • Test method for dissolution time of solid powdery substance in solution
  • Test method for dissolution time of solid powdery substance in solution

Examples

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Embodiment 1

[0050] This embodiment detects the dissolution time of nano-scale copper oxide in the acidic copper electroplating solution, including the following steps: accurately weighing 3.00 g of copper oxide powder specially used for PCB production. Measure 250mL of the acidic electroplating copper solution with a graduated cylinder. The acidic electroplating copper solution is a plating solution used for PCB electroplating copper production provided by Guangdong Dongshuo Technology Co., Ltd., containing copper sulfate, sulfuric acid and organic additives. Test according to the aforementioned method (laser wavelength is 420nm), perform an optical measurement every 0.5min, and record the change of shading rate with time. Such as figure 1 (a) As shown by SEM, the three-dimensionality of copper oxide particles dedicated to PCB production is nanoscale; the shading rate changes with time as shown figure 1 Shown in (b), the dissolving time is 6min.

[0051] Detecting the dissolving time of...

Embodiment 2

[0054] This example detects the dissolving time of polyphenylene amide in anhydrous acetone, including the following steps: accurately weighing 1.00 g of polyphenylene amide powder. Measure 50mL of anhydrous acetone with a graduated cylinder, test according to the aforementioned method (laser wavelength is 337nm), perform an optical measurement every 0.5s, and record the change of shading with time. In this example, acrylamide and acetone have strong absorption in the ultraviolet and infrared regions, and they are colorless and transparent in the visible region. Therefore, it is recommended to use a green laser to set the frequency of the laser in the visible region. The results of this experiment are as image 3 As shown, it takes 23s for polyacrylamide to completely dissolve in acetone.

Embodiment 3

[0056] This embodiment detects the dissolving time of sodium silicate powder in pure water, including the following steps: accurately weighing 2.50 g of sodium silicate powder. Measure 250mL of pure water with a graduated cylinder, test according to the above method (laser wavelength is 420nm), perform an optical measurement every 0.05s, and record the change of shading with time. Sodium silicate is very soluble in water, and the solubility in aqueous solution is extremely high, and after sodium silicate is dissolved in water, it becomes slightly yellow and obviously increases the viscosity of the solution. In this experiment scheme, the time interval of sampling is set to 0.05s, such as Figure 4 Shown, the dissolving time of described sodium silicate is 2.05s.

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Abstract

The invention discloses a method for detecting the dissolving time of a solid powder substance in a solution. This detection method uses a laser with a certain wavelength to penetrate the suspension that is undergoing a dissolution reaction. The laser is reflected and refracted by the solid particles in the suspension and Tyndall phenomenon occurs. The laser intensity signal after passing through the suspension is collected and recorded. The curve of the transition rate over time can accurately determine the time it takes for the solid substance to completely dissolve.

Description

technical field [0001] The invention relates to the technical field of analysis and detection, in particular to a method for detecting the dissolution time of a solid powdery substance in a solution. Background technique [0002] The chemical reaction in the liquid phase is fast, efficient, and has good selectivity. Therefore, the liquid phase reaction is often selected as the method for synthesizing target compounds in chemical industry production. This method is widely used in heavy chemical industry, daily chemical industry, pharmaceuticals, and raw material chemical industry. and so on in almost all chemical production fields. The premise of liquid-phase chemical synthesis is that all reactants are liquid and homogeneous. If the initial state of the reactants is solid, they must be dissolved in a suitable solvent, and then mixed together according to a certain ratio. chemical reaction under conditions. Such reaction processes are numerous in chemical industry productio...

Claims

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Application Information

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IPC IPC(8): G01N11/00G01N13/00
Inventor 王翀于永贞庄祥锋谭泽何为
Owner GUANGDONG GUANGHUA SCI TECH
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