QUALITY CONTROL OF LAB EQUIPMENTS

PIPETTES

• Classes:

    -As( A standard): the most accurate, for

       preparing calibrators

    -A: accurate, for transfer of standards

    -B: for transfer of reagents

    -S(student): for education

• Types: Transfer:

    - Transfer an accurately fixed volume

       of liquid

    -Using for standards and calibrators

       -Volumetric:  for nonviscous samples,

       -Ostwald-Folin: for viscous samples (eg.

             blood and serum),

               -Blow out(TD)

• Graduated or measuring:

         -For transferring reagents,

         -Not sufficiently accurate

    - Mohr: calibrated between two marks

    -Serologic: graduated marks down to the tip

        -Blow out(TD)