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Titration apparatus and titration method applied to analysis meter

A titration device and analyzer technology, applied in the field of analytical chemistry, can solve problems affecting the lower limit of machine measurement and detection limit, slow titration speed of high-concentration samples, and insufficient resolution of low-concentration samples.

Pending Publication Date: 2018-03-06
上海北裕分析仪器股份有限公司
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  • Application Information

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Problems solved by technology

[0007] Since the concentration of the titration sample is unknown, and due to the existence of low-concentration samples, it is determined that the titration reaction speed cannot be increased simply by increasing the concentration of the titration reagent or by increasing the input speed of the titration reagent, or the titration speed of high-concentration samples is slow ; Or the resolution of low-concentration samples is not enough, which affects the lower measurement limit and detection limit indicators of the machine, so that the speed-optimized results cannot be achieved for high-concentration and low-concentration samples at the same time

Method used

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  • Titration apparatus and titration method applied to analysis meter

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example 1

[0109] Example 1: Different titration channels are connected with reagents of different concentrations. According to the sample concentration, reagent channels of different concentrations are selected for titration in real time. When the sample concentration is high, the high-concentration reagent channel is automatically selected to open, and when the sample becomes low-concentration, it is automatically selected Open the low concentration reagent channel. In the same batch of tests, users do not need to replace reagents.

[0110] The specific control software, its operation and control method can be as follows:

[0111] Step 1. According to the current color of the solution, determine the concentration range of the solution to be titrated; for example, set the color of the solution to 10 color values, 0 is colorless, and 10 is the darkest. When the detection unit determines that the current color value is 5-10, it is a high density, and when the detection unit determines that th...

example 2

[0125] Example 2: Different titration channels are connected to the same concentration of reagents. According to different sample concentration requirements, each channel is titrated at different or same speeds simultaneously or sequentially. For example, in the initial stage of sample titration, in order to speed up the reaction, multiple channels can be opened at the same time. When the end is approaching, the faster channel is closed, and the slower channel is used to reach the end of the reaction.

[0126] The specific control software, its operation and control method can be as follows:

[0127] Step 1. Determine the concentration range of the solution to be titrated;

[0128] Step 2: Determine the number of channels for the first stage titration reagent according to the concentration range;

[0129] Step 3: Add indicator dropwise to the solution to be titrated; (for titration reactions that do not need to add indicator, do not add indicator)

[0130] Step 4. Perform multi-channel...

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Abstract

The invention provides a titration method and a titration apparatus applied to an analysis meter. The titration method is characterized in that the titration apparatus automatically selects and adjusts the concentration of a titration solution and / or the titration speed according to the real-time concentration of a to-be-measured solution until the titration end point is reached, and the to-be-measured index is calculated, wherein the titration apparatus comprises two or more mutually independent titration agent channels, and the agents at different concentrations are conveyed through different channels. According to the titration method and the titration apparatus provided by the invention, the titration scheme is adjusted according to the to-be-measured solutions at different concentrations, so that the effect of rapidly accurately titrating is achieved.

Description

Technical field [0001] The invention relates to the field of analytical chemistry, in particular to a titration device and a titration method applied to an analyzer. Background technique [0002] Titration analysis method, also called volumetric analysis method, drops a standard solution of known accurate concentration into the test solution (or drips the test solution into the standard solution) until the added standard solution and the test substance Quantify the reaction according to the stoichiometric relationship, then measure the volume consumed by the standard solution, and calculate the content of the substance to be tested based on the concentration of the standard solution and the volume consumed. The titration method often judges the end point of the titration by changing the color of the solution or the change of the potential. It is a simple, fast and widely used quantitative analysis method, with high accuracy in constant analysis. [0003] The titration device is a...

Claims

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Application Information

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IPC IPC(8): G01N31/16G01N21/78
CPCG01N21/78G01N31/16
Inventor 赵勇陈凡卢文武陆九如阳纯泉郑袁平刘文青曾建华
Owner 上海北裕分析仪器股份有限公司
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