PIPETTE : 9 ML GLASS VOLUMETRIC

A VOLUMETRIC PIPETTE ALLOWS EXTREMELY ACCURATE MEASUREMENT (TO FOUR SIGNIFICANT FIGURES) OF VOLUME OF A SOLUTION.

PIPETTE HAS A LARGE BULB WITH A LONG NARROW PORTION ABOVE WITH A SINGLE GRADUATION MARK AS IT IS CALIBRATED FOR A SINGLE VOLUME (LIKE A VOLUMETRIC FLASK).

USE A PIPETTE WITH A SIZE IS NEAREST TO THE VOLUME BEING WORKED WITH. RINSING THE PIPETTE BEFORE USE IS REQUIRED TO PREVENT ERROR.

HOLD THE PIPETTE TIP DIPPED IN THE SOLUTION WITHOUT TOUCHING THE BOTTOM OF THE BEAKER. THEN USE A PIPETTE PUMP / FILLER, TO DRAW THE LIQUID IN.

EFFECTIVE WAY TO CONTROL VOLUME OF THE SOLUTION - USE FOREFINGER. AFTER GETTING THE DESIRED VOLUME, RELEASE SOLUTION INTO ANOTHER VESSEL BY LIFTING THE FINGER. PIPETTE MUST ALWAYS BE HELD UPRIGHT.

SOLUTION WILL FORM A MENISCUS, WHOSE POSITION IS READ ACCORDING TO THE SCALE PRINTED ON THE PIPETTE. HIGH VISCOSITY LIQUIDS -VOLUME IS MEASURED BY LOOKING AT UPPER MENISCUS. LOW VISCOSITY LIQUIDS - VOLUME IS MEASURED BY LOOKING AT THE LOWER MENISCUS.