Which manufacturer of potentiometric titrator is better?

Founded in 1995, Dandong Baxter Instrument is the largest particle size instrument manufacturing enterprise in China, a high-tech enterprise, a provincial software enterprise, a top ten high-tech enterprise in the city, a provincial famous brand product, and a provincial "100 integrity enterprise". The main products are laser particle size analyzer, nanoparticle size analyzer, image particle analyzer, powder characteristic tester, sampler and filter membrane automatic weighing system. Baxter instruments are not only sold to 34 provinces and municipalities across the country, but also exported to more than 90 countries and regions such as Germany, the United States, South Korea, India, Vietnam, Brazil, and Russia.

As of 2021, Baxter Instruments has more than 20,000 units in the domestic and foreign markets, making it one of the brands with the largest number of particles in the world. For specific products**, please call** for consultation.

Jinan Haineng titrator is relatively good, Jinan Haineng company technology is relatively mature, products all over the country, good reputation, trustworthy.

Imports are Metrohm, METTLER, ** high.

Domestic Taizhou Datang, Shanghai Lei Ci, we originally used Shanghai Lei Ci, but no one repaired it, so we had to buy Taizhou Datang, both instruments are good, but the service is different.

Metrohm or Mettler, of course.

Imported Vantone and Mettler.

Domestic thunder magnetic, sea energy, pioneer Weifeng.

Brand model: Huawei MateBook D15

System: Windows 11

Potentiometric titration is a method of measuring potential changes during titration to determine the titration endpoint. Before and after the titration reaches the endpoint, the concentration of ions to be measured in the drops often varies by n orders of magnitude continuously, causing a sudden jump in potential, and the content of the measured components is still calculated by the amount of titrant consumed.

Using different indicator electrodes, potentiometric titration can be used for acid-base titration, redox titration, combined titration and precipitation titration. A pH glass electrode is used as an indicator electrode for acid-base titration, and in redox titrations, a platinum electrode can be used as an indicator electrode. In compound titration, a mercury electrode can be used as an indicator electrode if EDTA is used as a titrant, and in precipitation titration, a silver electrode can be used as an indicator electrode if halogen ions are titrated with silver nitrate.

During the titration process, with the continuous addition of titrant, the electrode potential E changes continuously, and when the electrode potential jumps, it means that the titration has reached the end point. It is easier to determine the titration endpoint with a differential curve than with a normal titration curve.

A potentiometric titrator (also known as a potentiometric titration analyzer) is a commonly used analytical testing instrument whose basic function is to determine the endpoint or titration point of a chemical reaction in a sample. This instrument can be used to determine the concentration of chemical substances, the amount of substances present, the acidity and alkalinity of substances, and other indicators.

Specifically, potentiometric titrators can perform the following functions:

1.Determination of pH in solution: Determination of pH in solution by comparing the potential changes in the reaction between the standard solution and the solution to be measured, usually including the determination of acidity, alkalinity and neutrality, etc.

2.Determination of the presence of substances: The presence of substances is determined by comparing the potential changes of the reaction of the substance to be measured with the standard solution in the sample, which is often used for the analysis and detection of drugs, environmental pollutants, etc.

3.Determination of the content of other substances in solution: When the content of one substance is known, the determination of the content of other substances in the same sample with a potentiometric titrator can obtain more comprehensive and accurate analytical data.

In addition, the potentiometric titrator can also perform multi-point measurement, drift checking, data processing and other functions to determine the chemical reaction data in the sample more accurately and accurately, and provide the basis for analysis and testing.

A potentiometric titrator is a chemical analysis instrument that uses potentiometric titration for quantitative measurement analysis. The potentiometric titrator has the following main functions:

1.Measuring the concentration of analytes: Potentiometric titrators can accurately measure the concentration of solutions in samples of analytes, effectively helping analysts to perform quantitative analysis.

2.Detection of substance quality: Potentiometric titrators can be used to detect the quality of chemical substances such as dairy, food, pharmaceuticals and electronics.

3.Analytical quality control: Potentiometric titrators can check the production process of the product to ensure that the quality control meets the requirements.

4.Heavy metal analysis: Potentiometric titrators can be used to detect heavy metal content in the environment to meet national regulatory standards.

In short, potentiometric titrators can be widely used in biomedicine, environmental analysis, pharmaceutical, food science, materials science and other fields, and have an important analytical and detection role.

The accuracy of the automatic injector will affect the accuracy of the measurement as a function of the titrant-titration being titrated.

a) the accuracy of the automated titration injector; When the titration is immersed in the titration solution with the nozzle that discharges the titration solution, the accuracy is about the same. If the nozzle is not immersed in the titration solution, one drop is about one. Therefore, titration of one drop (assuming instillation or non-instillation) is measured with the following accuracy;

1) The titration is 10 ml, and (2) the titer is 1 ml, the accuracy is 5%.

b) the relationship between the titrant and the titrated solution;

There are many combinations of relationships, which are illustrated below only for acid-base titration;

1) If you use strong acids such as hydrochloric acid and caustic alkali.

When titrating with strong alkaline aqueous solution, because of its extremely fast reaction speed and its equivalent.

The points are also very clear, so there are almost no errors.

2) On the other hand, the acid value of the neutral value measurement method such as oil.

During titration, because it is a non-aqueous acid-base titration, the reaction speed is very slow and the equivalent is not clear. Therefore, the reproducibility of the measured value is worse than that of the aqueous solution titration.

How many samples should be taken?

The amount of sample taken is enough to achieve the target value of 5 10 ml after titration.