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A kind of test method of calcium content in cocoon layer of tussah silkworm

A testing method and cocoon layer technology are applied in the field of testing calcium content in the cocoon layer of tussah silkworm cocoons, which can solve the problems of cumbersome operation process and low accuracy, and achieve the effects of simple operation process, high accuracy and high simplicity.

Active Publication Date: 2019-11-08
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the defects and problems of low precision and complicated operation process in the prior art, and provide a method for testing the content of calcium in the cocoon layer of tussah cocoons with high precision and simple operation process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] A method for testing the content of calcium in tussah cocoon cocoons, said method for testing comprises the following steps in turn:

[0056] Acquisition of the reaction solution: First dissolve complete EDTA or EDTA-2Na with NaOH solution (1mol / L-1.5mol / L) to obtain the initial solution, wherein the concentration of the initial solution obtained by dissolving EDTA is 0.01-1.0mol / L, dissolve The concentration of the initial solution obtained by EDTA-2Na is 0.01-0.3mol / L, and the number of initial solution is at least three, and then the initial solution is neutralized to a pH of 6 with HCL solution (0.5mol / L-1mol / L). -7 to obtain the reaction solution;

[0057] The progress of the reaction: first add the pulverized tussah cocoon layer to the above reaction solution one by one, the dosage ratio of the tussah cocoon layer to the corresponding reaction solution is 1:100-1:50g / ml, React for 1h-2h with stirring to obtain the observed liquid;

[0058] Determination of calci...

Embodiment 2

[0060] Basic content is the same as embodiment 1, the difference is:

[0061] The number of initial solution is five, and when the solute in the initial solution is EDTA, its concentration is 0.01mol / L, 0.02mol / L, 0.04mol / L, 0.06mol / L, 0.08mol / L.

[0062] The number of parts of the initial solution is five parts. When the solute in the initial solution is EDTA-2Na, its concentration is 0.01mol / L, 0.03mol / L, 0.06mol / L, 0.12mol / L, 0.25mol / L.

Embodiment 3

[0064] Basic content is the same as embodiment 1, the difference is:

[0065] The number of parts of the initial solution is six parts. When the solute in the initial solution is EDTA, its concentration is 0.01mol / L, 0.02mol / L, 0.04mol / L, 0.06mol / L, 0.08mol / L, 1.0mol / L L.

[0066] The number of initial solution is six, and when the solute in the initial solution is EDTA-2Na, its concentration is 0.01mol / L, 0.03mol / L, 0.06mol / L, 0.12mol / L, 0.25mol / L, 0.30 mol / L.

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Abstract

The invention discloses a test method for calcium content in a tussah cocoon shell. The method comprises the steps: preparing multiple parts of EDTA or EDTA-2Na solutions by using a NaOH solution, a HCL solution, EDTA and EDTA-2Na, adding the tussah cocoon shell to react, selecting the solution with best apparent form of the tussah cocoon shell to filter so as to obtain filtrate after the reaction is finished, conducting a single-channel scanning inductively coupled plasma emission spectroscopy (ICP-AES) on the filtrate to determine the content of Ca<2+>, that is, calcium content in the tussah cocoon shell, and then calculating the calcium oxalate crystal content of the tussah cocoon shell. The design is not only high in precision and good in accuracy, but also simple in operation process and conducive to cocoon reelability of silks in the tussah cocoon.

Description

technical field [0001] The invention relates to a method for testing calcium content in natural products, belonging to the technical field of detection, in particular to a method for testing calcium content in cocoons of tussah silkworms, which is particularly suitable for improving accuracy and reducing operational difficulty. Background technique [0002] The cocoon layer of tussah cocoon has good thermal insulation performance and can resist the cold weather outside. The existence of calcium oxalate crystals helps to reduce the penetration of external air into the cocoon, which can reduce the penetration of wind and form a microclimate between the cocoon layers, so It can effectively maintain the thermal insulation of the tussah cocoon layer under windy conditions. The content of calcium oxalate crystals is also an important factor affecting the thermal performance of tussah cocoons. After studying the structure of tussah silkworm cocoons, the type of calcium oxalate cry...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/73
CPCG01N21/73
Inventor 武继松李梦茹肖军
Owner WUHAN TEXTILE UNIV
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