Cardinal Moisture Analyzer Maintenance Precautions :
1, most instruments using a dual polarized platinum electrodes to measure the voltage. After a period of use, some of the Karl Fischer reagent and sample electrode response will fail to identify the end of the delay, as well as the end color changed to yellow-brown and not, at this time it is necessary electrode cleaning. When cleaning, the electrode is usually placed in an ultrasonic cleaning bath with deionized water or ethanol for a few minutes ; or in chromic acid for 60s , then rinsed with deionized water or ethanol ( dry before use ) . Table 3 lists the types of contaminants and their cleaning methods.
Table 3 method of cleaning pollutants
Type of pollutant        detergent
Fatty oil        Mixture of chloroform and toluene
Polar substance          dimethylformamide
Salt            Carbohydrate
Resin polymer material    Alcohol acetone ether
Pigment material        Dilute bleach
2, in general, the value of drift of the instrument a few microliters per minute (refer to the titration cell is kept dry, Karl Fischer reagent amount per unit time consumed; the agent to an aspect of the titration titration cell Moisture , on the other hand, compensates for the slow consumption of iodine caused by side reactions ) . If the drift value becomes large , it is necessary to check the leakiness of the moisture analyzer or consider the regenerated molecular sieve. During regeneration, the molecular sieves are placed in a drying oven at 160 to 300 ° C for at least 24 hours . The molecular sieve installed on the waste water bottle contains water and sulfur dioxide , so it must be washed with distilled water before regeneration.
3, burette was washed with ethanol. Do not place the burette at temperatures above 40 °C . Rubber O-ring and is connected with the pad is not placed in an organic solvent.
4. The moisture analyzer has a self-test system inside . If the instrument fails , it will give a corresponding fault signal. As long as the instrument manual user control, you can understand the fault cause and targeted to be eliminated.
5 , the instrument must be placed in a dry and clean environment , and arranged for special personnel to keep ; if not used for a long time , all the reagents in the instrument must be taken out , and all the pipes should be cleaned and air-dried.
Series related products are: volumetric moisture analyzer, coulometric moisture analyzer, halogen moisture analyzer
Select Booster Pads,Total Dry Booster Pads,Diaper Inserts For Adults,Adult Diaper Booster Pads
Shandong Kangshun Daily Products Co., Ltd , https://www.centurybenifit.com