MA-1 intelligent Karl Fischer moisture meter for urea detection

Summary

Using the MA-1 Smart Karl Fischer Moisture Analyzer to detect moisture in urea according to GB/T2441

content

Use the MA-1 Smart Karl Fischer moisture meter to measure the moisture content of urea according to GB/T2441:

1. Calibration of Karl Fischer reagent:

According to the procedure specified in GB/T 6283, the titer T of the reagent to water is calibrated with water.

2. Determination:

Weigh 1g-5g with a weighing tube, laboratory sample (accurate to 0.0002g), and ask for the amount of sample weighed to consume no more than 10ML of Karl Fischer reagent.

Add about 50ml of anhydrous methanol to the reaction cup. The amount of methanol must be sufficient to submerge the electrode. Turn on the stirring and set the rotation speed to: 100-180. Titrate to the end point and keep it in the same time as the Karl Fischer reagent. the above.

Open the filling port sealing plug, quickly add the weighed sample to the reaction cup, immediately cover the sealing plug, stir and dissolve, input the weight of the added sample, press the measurement start button, the instrument will automatically alarm and stop when it reaches the end point. Titration, automatically record the volume of Karl Fischer reagent consumed, and automatically calculate the value of the detected water content;

3. The absolute difference of the parallel determination results is less than 0.03%;

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