Automatic titration device for supporting chemical oxygen demand in water

Abstract

The invention provides a high-flux automatic titration device for detecting chemical oxygen demand. Thehigh-flux automatic titration device comprises an injection pump, a three-way valve, a color sensor, a light source, a liquid adding arm, a rotary sample bottle tray, a tray motor and a magnetic stirrer;the rotary tray enables sample bottles to be titrated to be aligned with the liquid adding arm in sequence; the situation that a complex driving device needs to be designed due to excessive movement of the liquid adding arm is avoided, and the device is simplified; the liquid adding arm is of a hollow structure and can add liquid in a fixed or rotating mode. The injection pump, the liquid adding arm, the color sensor, the light source, the sample bottle tray motor and the magnetic stirring motor are all connected with the automatic controller, and the processes of liquid taking, rotating, liquid injecting, stirring, detecting and the like are completed according to instructions of the automatic controller. Whether the sample bottles exist on the tray or not can be pre-judged, so that whether the liquid adding arm adds liquid or not is determined, any amount of titration reagent can be added into each sample bottle, the completion of previous titration does not need to be waited, the operation time is saved, and the high-flux titration of various to-be-detected samples is realized.

Description

technical field [0001] The invention provides a titrator supporting automatic titration of chemical oxygen demand in water, specifically a titrator or device capable of high-throughput automatic titration of chemical oxygen demand, which belongs to the field of analytical instruments. [0002] Background of the invention [0003] Chemical-Oxygen-Demand (Chemical-Oxygen-Demand), referred to as COD, refers to the mass concentration of oxygen corresponding to the strong oxidant potassium dichromate consumed by dissolved substances and suspended solids in water under certain conditions, expressed in mg / L meter. It is a comprehensive indicator of reducing substances in water. The COD in the water body is too high, indicating that the organic pollution is very serious, which will destroy the balance of the environment and biological communities, and cause the deterioration of the water body. Therefore, COD is an important parameter of sewage treatment plants and an important ind...

AI Technical Summary

Problems solved by technology

However, this liquid-filling arm and driving device need to be provided with complex guide rails and moving sliders to drive the liquid-filling arm to achieve two directions (such as horizontal and vertical) sample titration, and this design requires that the sample vial tray be designed as Similar to a spotting multi-well plate, this leads to the fact that the vials to be titrated need to be placed in an uninterrupted sequence, otherwise there will be an empty tray opening that will cause the sample loading arm to stagnate here, or even make a wrong titration, or drive the loading arm to achieve a Direction (such as the horizontal direction) to add samples for titration, which affects the titration quantity, and at the same time, it is easy to make the COD analyzer too large

In addition, these automatic titration devices are mostly integrated into the COD analyzer, lacking an independent and single titration device, which is not the need of laboratories with limited conditions and only high-throughput titration

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