Capacity Analysis and Automatic Potentiometric Titrator
The automatic potentiometric titrator is a common analytical instrument for capacity analysis designed according to the principle of potential method.
The principle of the potential method is to select a suitable indicator electrode and a reference electrode to form a working battery with the solution to be tested. With the addition of the titrant, the concentration of the measured ions constantly changes due to the chemical reaction, thus indicating the potential of the electrode. It changes accordingly. Near the end of the titration, the measured ion concentration is abrupt, causing a sudden jump in the electrode potential. Therefore, the titration end point can be determined based on the jump of the electrode potential.
The instrument is divided into two parts: the electronic meter and the titration system. The electric meter uses an electronic amplification control circuit to compare the potential between the indicator electrode and the reference electrode with a preset end point potential. The difference between the two signals is amplified and controlled to titrate. The drip rate of the system. After reaching the preset potential at the end point, the titration stops automatically. The instrument controls the amount of dripping for the microcomputer, and its structure is divided into two parts: the electric meter and the titration system.
Automatic potentiometric titrator
The automatic potentiometric titrator is suitable for the capacity analysis with the potential as the detection index, and can be used as a special instrument for penicillin detection. The automatic potentiometric titrator adopts a plunger type titration method, and the titration process of the plunger is controlled by a single chip microcomputer, and the dynamic signal of the electrode is collected. During the titration process, the solution in the titration cell produces different potential changes. When the potential change of △E/△V is greater than the threshold value, it is the equivalent value. When the set condition is met, the instrument goes to the stop program, stops the titration and stops the titration. The measurement results are obtained.
Application field
Determination of total organic acid content, chloride ion content in water, acidity of honey and its products, content of dipfluzine, hydrogen peroxide in food, nitrate nitrogen in drinking water, SO4^2- in water by potentiometric titration Application, total acidity of fruit juice and fruit juice of pineapple, citrus juice, sodium glutamate content in chicken essence, sodium citrate content, iodine content in iodized salt, halogen ion in water, sodium glutamate in monosodium glutamate, free SO2 in wine, total SO2 rice Middle vitamin B1 content, total acid and amino acid nitrogen in soy sauce, vitamin C in litchi, melamine in solution, trace zinc in milk powder, vitamin C in dark vegetables and fruits, determination of potassium in potassium, caffeine Content, arsenic in caffeine, total acid and amino acid nitrogen in condiments, total hardness in water, calcium in high calcium foods, garlicin content in garlic, acidity in milk and dairy products.
