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Instructions for use of calomel electrodes
1.Calomel Electrode in Use,The rubber cap at the side and end should be removed first.,In order to make salt bridge solution borrow gravity dimension
Formation and passage of a given flow rate with the solution under test。
2.No bubbles in the solution of potassium chloride in the electrode,A little potassium chloride crystal should be retained in the solution。
3.The salt bridge solution surface of calomel electrode should be slightly higher than the measured solution surface.,Preventing the Rediffusion of the Measured Solution to the Calomel Electrode。
4.Because the electrode potential of calomel electrode has greater negative temperature coefficient and thermal hysteresis,Therefore, temperature fluctuation should be prevented in measurement.。Accurate measurement should be constant temperature。
5.If the measured solution is found to be contaminated with the liquid complexes of calomel electrodes,Scale should be scraped off at any time。
6.Calomel electrodes are generally unsuitable70℃Use in the above environment。
7.When potassium chloride solution and crystal are attached to the surface of the electrode,Should be removed at any time。
8.Potential changes caused by photolysis of calomel electrode,Avoid light when using and storing。
9.Double salt bridge saturated calomel electrode with coat(217type),If the outer sleeve is removed, it can be used as a general saturated calomel electrode.。When the test is susceptibleK+orCl_When interfering with the sample,It is necessary to fill the outer casing with other appropriate solution.。for example:Measuring with potassium electrodeK+Time filling0.1MLiAc;Measuring with chlorine electrodeCl_Time filling0.1MKNO3;Measuring with sulphur electrodeS2—Time filling1MKNO3;Wait。
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