Quotation for Bromine Value Bromine Index Tester

　　SH-200Bromine Value Bromine Index TesterIt is a new generation of intelligent instrument based on the principle of microcoulometric titration, using computer-controlled measurement and electrolysis, and data processing. Compliant with SH/T 0630 standard.

The bromine value bromine index analyzer uses the potential method to indicate the endpoint, and its signal stability is one order of magnitude higher than the commonly used current method. It also uses a specially designed artificial sand core instead of the commonly used glass sand core and ion exchange membrane, making it easy to operate. Compared with similar instruments at home and abroad, it has the characteristics of fast balance speed, good stability, automatic endpoint judgment, accurate results, easy operation, fast analysis speed, automatic data processing, and continuous printing.

The bromine value bromine index analyzer can be widely used for the determination of bromine value and bromine index of petroleum and chemical products such as gasoline, kerosene, diesel, lubricating oil, and light and heavy aromatic hydrocarbons.

IISH-200Bromine Value Bromine Index TesterMeasuring principle

1. Coulombic titration is an electrochemical analysis method that differs from the volumetric method of adding titration solution. It uses electrolysis to produce the titrant in an electrolytic cell, and calculates the content of the analyte based on Faraday's law of electrolysis and the amount of electricity consumed during electrolysis.

2. Like the general volumetric titration method, microcoulometric titration also requires a method to indicate the endpoint, among which the commonly used method is the potentiometric method, because it has the advantages of stable signal and high sensitivity. Therefore, in the methods matched with this instrument, the potentiometric method is used to indicate the titration endpoint.

In microcoulometric titration, the electrolytic current is a variable current that varies over time. The magnitude of the current is determined by the signal generated by the sample entering the electrolytic cell. This signal is amplified and transmitted to the electrolytic cell for electrolysis, producing the titrant. As the measured substance gradually decreases, both the signal and electrolysis current will gradually decrease, ultimately detecting the amount of the measured substance W (grams).

∫0tIdt M M

W (g)=---------- In the equation: - is the gram equivalent of the substance being measured.

96500 n n

When no sample enters, there is also a signal between the indicator electrodes. In order to prevent this signal from generating electrolytic current, a voltage of equal magnitude and opposite direction is connected in series between the indicator electrode pairs to make the input signal of the amplifier zero. This series voltage is called bias voltage or terminal voltage.