On-line polarogram analyzer

Abstract

The invention relates to an online polarographic analyzer which belongs to polarographic analysis equipment and comprises a sampling device and a constant temperature measuring device. The constant temperature measuring device comprises a reaction cup as well as a mercury electrode, a platinum electrode and a reference electrode which are all arranged on the rim of the reaction cup, and the mercury electrode comprises a mercury cup and a capillary tube connected to an open pore at the bottom of the mercury cup. The sampling device comprises a sampling tube, an air blowing pump and an air extracting pump and is provided with an upper end plug and a lower end plug respectively at the upper end and the lower end, wherein a conduit tube is inserted in the upper end plug, the lower end of the conduit tube extends into the sampling tube, the upper end of the conduit tube is connected with a water sample inlet valve, a water sample outlet tube for communicating the inside of the sampling tube and the reaction cup is also inserted in the center of the lower end plug, and the water sample outlet tube is provided with a water sample outlet valve; the air blowing pump is communicated with the middle of the conduit tube after passing through an air blowing tube of the upper end plug through an air blowing valve sequentially; and the air extracting pump is communicated with the middle of the conduit tube after passing through an air extracting tube of the upper end plug through an air extracting valve sequentially. The invention is accurate in sampling and can directly measure the components of suspension, dreggy waste liquor, and the like.

Description

technical field [0001] The invention belongs to the field of polarographic analysis equipment, in particular to an online polarographic analyzer. Background technique [0002] Polarography is one of the most important and successful branches of electrochemical analysis, which was proposed in 1922 by the Nobel laureate Hailovsky. By virtue of the electrochemical redox reaction of the components in the solution on the surface of the mercury dropping electrode, it is possible to qualitatively distinguish many solution components and quantitatively determine the concentration of each component in the solution. Over the past 80 years, the scope of theories, methods, instruments and applications of polarography has been continuously enriched and expanded. Since various specific components (ions) have specific polarographic peaks at each specific potential within a certain potential range in a specific bottom liquid, and the peak current value is positively correlated with the con...

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Problems solved by technology

However, in the actual process, due to the influence of sediment, particulate matter or turbidity, problems such as blockage, wear and plastic deformation of pipelines and nozzles often occur, and it is very difficult to keep the above parameters constant, and it is impossible to realize sampling and measurement very precise

In addition, in actual operation, there are still problems such as the peristaltic pump pipeline needs to be replaced frequently, the metering pump has a short life, the sampling time is too long, a large amount of sampling liquid is discarded, and cleaning is difficult, which affects the normal development of online monitoring

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