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An agar electrolyte solid-state salt bridge and a pH sensor using it

An electrolyte and electrolyte solution technology, applied in the field of electrochemical detection, can solve the problems that the salt bridge cannot meet the on-site online monitoring, signal detection failure, etc., and achieve the effect of stable bridge difference performance, resistance to bacterial degradation, and good electrical conductivity.

Active Publication Date: 2020-06-12
青岛菲优特检测有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The bridge difference is constantly changing, and the resistance increases, which leads to signal detection failure
Traditional salt bridges cannot meet the needs of on-site online monitoring

Method used

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  • An agar electrolyte solid-state salt bridge and a pH sensor using it
  • An agar electrolyte solid-state salt bridge and a pH sensor using it
  • An agar electrolyte solid-state salt bridge and a pH sensor using it

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1: Glass electrode pH sensor

[0037] see figure 1 , the glass electrode pH sensor 20 made of the agar electrolyte solid salt bridge of the present invention mainly includes a housing 14 , an agar electrolyte solid salt bridge 11 and a glass electrode 10 . The glass electrode 10 is located in the center, the agar electrolyte is filled between the shell and the glass electrode 10, and the upper and lower ends are sealed with insulating materials 15 and 13 respectively. Filling liquid 17 is filled in the glass tube of glass electrode 10, and filling liquid 17 is the HCl solution of 0.1M, uses Ag wire (Ag / AgCl) as display electrode 18 and draws outwards to coaxial cable 16 by lead wire, and glass electrode 10 The lower end probe 19 is a glass bubble. The agar electrolyte solid salt bridge 11 is provided with a ring-shaped Ag wire reference electrode 12, and the reference electrode 12 is connected to an external coaxial cable 16 through a wire.

Embodiment 2

[0038] Example 2: Antimony electrode pH sensor

[0039] The glass electrode 10 in Example 1 is replaced by an antimony electrode, and other structures are the same as in Example 1, thereby forming an antimony electrode pH sensor.

[0040] see figure 2 When the pH sensor made by the above-mentioned embodiment is used to detect the pH value of the water body on site, the concave water flow channel 21 is arranged around the probe head 19 of the pH sensor, so that the probe head 19 is located in the groove of the concave water flow channel 21, An ultrasonic cleaning device is installed below the tank, and the ultrasonic cleaning device includes an ultrasonic vibrator 23 and a 316L stainless steel diaphragm 22 located on the upper surface of the ultrasonic vibrator 23 . During the detection process, cleaning the probe head 19 by an ultrasonic cleaning device can ensure that the sensor is not stained, so that the probe head 19 maintains a fresh surface and can maintain a high degr...

Embodiment 3

[0043]Embodiment 3: Rapid monitor for radioactivity in water body

[0044] see Figure 4 , the water body radioactivity rapid monitor includes a quantitative fixed-speed water pump, a filter, a mixer, an adsorption column and a gamma spectrometer connected in sequence, wherein the front end of the mixer is also connected with a constant ratio acid pump, and the rear end of the mixer is connected with a pH sensor. Both the pH sensor and the acid pump are connected to the programmable controller, which is connected to the touch screen. After the water pump collects seawater, the suspended solids are removed through the filter, and the flow rate of the acid pump is adjusted through the pH value fed back by the pH sensor, so that the detected water body remains at a predetermined pH value and enters the adsorption column for radioactivity detection.

[0045] After the Fukushima nuclear accident in Japan on March 11, 2011, the above-mentioned rapid water radioactivity monitor prod...

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PUM

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Abstract

The invention discloses an agar electrolyte solid salt bridge and a pH sensor using the agar electrolyte solid salt bridge, and in the agar electrolyte solid salt bridge, the electrolyte is prepared from the following components in parts by weight: 8 to 30 parts of KCl, 0.01 to 0.3 part of sodium benzoate, 0.05-0.8 part of Triton X100 and 2 to 5 parts of agar powder. The agar electrolyte solid salt bridge prepared by the invention has a good electrical conductivity, and is resistant to bacterial degradation, capable of withstanding a long-term immersion in hot water with the temperature of 50EDG C or below, resistant to an ultrasonic shock, and has stable bridge differential current performance.

Description

technical field [0001] The invention generally relates to the field of electrochemical detection, in particular to an agar electrolyte solid salt bridge and its application. Background technique [0002] Salt bridge is a common method of electrochemistry, which has experienced nearly 200 years of development. The common salt bridge is a saturated KCl solution. In modern times, various micro porous plastic salt bridges have been developed for electrophoresis, micro-pipe analysis, and there are also micro salt bridges for intracellular electrochemical analysis. [0003] Saturated KCl solution salt bridges in the prior art, diaphragm agar salt bridges, ceramic-plastic porous material junctions and other types of salt bridges are characterized by easy loss, instability, large conductive resistance, and potential drift. They are used for environmental monitoring and cannot Meet the long-term stability requirements. For pH measurement, its drift is much larger than the normal ra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/28G01N27/30G01N33/18G01T1/167
CPCG01N27/28G01N27/302G01N33/18G01T1/167
Inventor 杨树力
Owner 青岛菲优特检测有限公司
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