Course B: The different in between Course A/AS and Course B would be that the mistake limitations for Class B are twice that permitted classes A and AS, Class B pipettes is often made of plastic, as well as supply process (TD, Ex) waiting time isn't really specified.[four] pH Measurements: https://pipette-types-and-uses12211.smblogsites.com/29359549/rumored-buzz-on-four-types-of-pipette-according-to-use