How pH measurement is done?

The pH value can be measured using electrochemical measuring systems, litmus paper, or indicators and colorimeters. The easiest way to take a pH measurement is to use litmus paper or a colorimeter. The advantage of this type of pH measurement is that the pH range is well known and they are easy to apply.

What are three ways to measure pH?

The methods for measuring pH fall roughly into the following four categories:

• Indicator methods.
• Metal-electrode methods (including the hydrogen-electrode method, quinhydron-electrode method and antimony-electrode method)
• Glass-electrode methods.
• Semiconductor sensor methods.

How do you measure pH of gel?

There is no special method available for measuring the pH of gel, but you can use glass electrode based pH-meter system for this purpose. But keep in mind that pH must be recorded without any dilution.

How is the pH of mash slurry measured?

Application Description. Many Ethanol plants running today are using a combination style pH electrode with a non-flowing reference to measure pH in the Mash Slurry transfer line from the Mash slurry mix tank to cook. The Mash is being pumped out of the Mash Slurry tank is at approximately 180 °F and 40 to 60 psig.

What should the pH level be for slurry casting?

Some foundries prefer to keep slurry pH in a higher range, 9.5-10.0. If slurry pH has been allowed to drop to the 9.0-9.2 level, care must be taken not to shock the slurry. Adjustments to bring slurry pH into a higher range should be done in two or more steps rather than in one large step.

What happens when the pH of a slurry increases?

In general, as the pH of a slurry approaches its minimum or maximum recommended limits, the slurry is at a greater risk of gelling. Refractory materials, waxes, and water may all have components that reduce the pH of slurries.

Is it possible to read the wrong volume of slurry?

It is also possible to easily read the incorrect volume of slurry poured into a measuring cylinder. Make sure you are level with the graduations of the measuring cylinder, so you can see the level of the slurry straight on, looking down, or up to the level will create parallax errors. Parallax Errors in Reading Measuring Cylinders.