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Salted egg white salt detection method based on mutual voltage principle

A technology of mutual inductance voltage and detection method, which is applied to the detection of salted egg white salt, and the field of rapid detection of salted egg white salt based on induced ion voltage, can solve the problems of unfavorable rapid detection, large consumption of reagents, cumbersome operation, etc., and achieves short measurement time. , Simple operation, high precision effect

Active Publication Date: 2014-02-05
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the commonly used method to detect the salt content of salted egg white is the silver nitrate chemical titration method, which is cumbersome to operate, consumes a lot of reagents, and is expensive, which is not conducive to rapid detection

Method used

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  • Salted egg white salt detection method based on mutual voltage principle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Take a total of 250ml of salted egg white sample 1, slowly inject it into the glass connector 4, and fill it with glass spring 7 to form an open circuit state, then put a pair of platinum electrodes 5 into the salted egg white 8 to be tested; turn on the signal generator 1 to make it Send out a sinusoidal alternating signal with a frequency of 614kHz and an excitation voltage of 5V, the excitation coil winding 2 generates alternating magnetic flux, a magnetic circuit 9 is formed in the annular silicon steel core 3, and an induced ion voltage is generated in the salted egg white 8 to be tested in the glass spring 7 U, and is detected by the digital AC millivolt meter 6 through the platinum electrode 5, and the measured voltage value (that is, the induced ion voltage U) is 302.1mV, which is calculated by the following formula: Salt (%)=(0.00095U-0.18)×100 , the salt content of salted egg white sample 1 was 10.7%.

Embodiment 2

[0023] Take a total of 250ml of salted egg white sample 2, slowly inject it into the glass connector 4, and fill it with glass spring 7 to form an open circuit state, then put a pair of platinum electrodes 5 into the salted egg white 8 to be tested; turn on the signal generator 1 to make it Send out a sinusoidal alternating signal with a frequency of 605kHz and an excitation voltage of 6V, the excitation coil winding 2 generates alternating magnetic flux, a magnetic circuit 9 is formed in the annular silicon steel core 3, and an induced ion voltage is generated in the salted egg white 8 to be tested in the glass spring 7 U, and detected by the digital AC millivoltmeter 6 through the platinum electrode 5, the measured voltage value (i.e., the induced ion voltage U) is 275.8mV, and the salt content of the salted egg white sample 2 is calculated by the formula (same as Example 1). was 8.2%.

Embodiment 3

[0025] Take a total of 250ml of salted egg white sample 3, slowly inject it into the glass connector 4, and fill it with glass spring 7 to form an open circuit state, then put a pair of platinum electrodes 5 into the salted egg white 8 to be tested; turn on the signal generator 1 to make it Send out a sinusoidal alternating signal with a frequency of 610kHz and an excitation voltage of 7V, the excitation coil winding 2 generates alternating magnetic flux, a magnetic circuit 9 is formed in the annular silicon steel core 3, and an induced ion voltage is generated in the salted egg white 8 to be tested in the glass spring 7 U, and detected by the digital AC millivoltmeter 6 through the platinum electrode 5, the measured voltage value (ie, the induced ion voltage U) is 269.5mV, and the salt content of the salted egg white sample 2 is calculated by the formula (same as Example 1). was 7.6%.

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Abstract

The invention relates to a salted egg white salt detection method based on a mutual voltage principle. The method adopts a device comprising a signal generator, a coil winding, an annular silicon steel iron core, a glass communicating vessel, a pair of platinum electrodes, a digital alternating-current millivoltmeter and a glass spring. The detection method comprises the following steps: injecting salted egg white to be detected in the glass communicating vessel, placing the platinum electrodes in the salted egg white to be detected, starting the signal generator to send out a sinusoidal alternating-current signal with the frequency of 600-614 kHz and the excitation voltage effective value of 5-7 V, exciting the coil winding to generate an alternating flux, generating an induced ion voltage U in the salted egg white to be detected in the glass spring, detecting through the platinum electrodes by the digital alternating-current millivoltmeter, and calculating the salt content of the salted egg white to be detected through a formula. The method disclosed by the invention can be used for quickly detecting the salt content of the salted egg white without any chemical reagent and is simple and convenient in operation, high in precision and high in repeatability.

Description

technical field [0001] The invention relates to a method for detecting the salt content of salted egg white, in particular to a method for rapidly detecting the salt content of salted egg white based on induced ion voltage, which belongs to the technical field of food physical and chemical detection, and belongs to the cross application field of food science and electromagnetics. Background technique [0002] Salted eggs are one of the traditional Chinese foods. They are loved by consumers because of their soft and loose sandy texture, delicious taste and rich nutrition. In addition to direct consumption of salted eggs, salted egg yolks are also used as food ingredients in mooncakes, zongzi and other products, and salted egg whites can also be used as other food accessories, such as added to dumpling wrappers, bun wrappers, catering seasonings or baked goods. , to improve the taste and quality of the product. Salted egg white is an important part of salted eggs. It contains...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/74
Inventor 徐学明赵娟娟杨哪金征宇金亚美吴凤凤周星马倩
Owner JIANGNAN UNIV