Shanghai Kulun Trace Moisture Analyzer

Shanghai Kulun Trace Moisture AnalyzerThe instrument adopts advanced automatic control circuits and a novel external structure, making it more reliable and convenient to use. It has the characteristics of fast analysis speed, simple operation, high accuracy, and strong automation. Widely used in sectors such as petroleum, chemical, power, railway, pesticide, medicine, and environmental protection.

Technical Parameter：

drip calm square Formula: Electric titration (Coulomb analysis)

Show off Display: Large screen color LCD touch screen

Electrolytic current control: 0-400mA automatic control

measure measure Fan Circumference: 5ug~30mg

quick Min Valve: 0.1 µ g H₂O

refined Indeed Degree: 10 µ g to 1000 µ g ± 3 µ g (not more than 0.3% for 1mg and above)

strike seal Machine: Micro thermal printer

Power supply: 220V ± 10%, 50Hz

Power: ＜ 40W

Operating environment temperature: 5-40 ℃

Usage environment humidity: ≤ 85%

Working principle

The reaction equation between Karl Fischer reagent and water is:

I2 + SO2 + 3C5 H5 N + H2O —→ 2C5 H5 N•HI + C5 H5 N•SO3 ……………… (1)

C5 H5 N•SO3 + CH3OH —→ C5 H5 N•HSO4CH3 …………………………… (2)

The reagent solution used is a mixture of dominant iodine and arsenic, methanol, etc. filled with sulfur dioxide. Iodine is formed on the anode through electrolysis, and the generated iodine is directly proportional to the amount of charge according to Faraday's law. The following formula:

2I¯+ 2e —→ I2 …………………………………………………… (3)

From equation (1), it can be seen that the number of moles of iodine participating in the reaction is equal to the number of moles of water. Inject the sample into the electrolyte, and the water in the sample participates in the reaction. The instrument can reflect the consumption of iodine during the reaction process, and the consumption of iodine can be calculated based on the amount of electricity required to electrolyze the same amount of iodine. After calculation by the instrument, the measured water content is directly displayed on the digital display. The instrument adopts an electrolytic current automatic control system, and the magnitude of the electrolytic current can be automatically controlled according to the moisture content in the sample, with a maximum of 300mA. During the electrolysis process, the moisture gradually decreases, and the titration rate decreases proportionally until the electrolysis endpoint control circuit is activated. This system ensures high precision, high sensitivity valves, and high speed during the analysis process. In addition, during the measurement process, it is inevitable to introduce some interfering factors, such as moisture invading from the air, causing the titration cell to absorb moisture and generate blank current. However, as the instrument has the function of storing blank current, the number displayed on the screen is the true water content in the tested sample.