Standard buffer solutions for pH-meter calibration. pH-meters measure the voltage. developed between two electrodes. immersed in the sample and. compare that value to a calibration. derived from the same electrode. pair and known standards.
Collinsville, Illinois. Built in 1949 in this former catsup company town, the World's Largest Catsup Bottle celebrated its 65th anniversary in 2014. It's the water tower at the old Brooks Catsup Plant and headquarters.
Chimelong Ocean Kingdom also hold the records for largest underwater viewing dome, largest aquarium tank, largest aquarium window and largest acrylic panel, Guinness Book of World Records reports. The aquarium boasts a total water volume of 12.87 million gallons.