Pharm tech ch 6

Alligation alternate

A mathematical method of solving problems that involves the mixing of two solutions or two solids with different percentage weight to achieve a desired third strength

Apothecary system

A system of measurement once used in the practice of pharmacy to measure both volume and weight; this system has been mostly replaced by the metric system

Avoirdupois system

A system of measurement previously used in pharmacy for the determination of weight in ounces and pounds; this system has been mostly replaced by the metric system

Conversion factor

A fraction with the numerical value of 1, which is used to covert one unit to another w out changing the value of the number

Diluent/solvent

An inert product, either liquid or solid, that is added to a preparation to reduce the strength of the original product

Dilution

The process of adding a diluent or solvent to a compound, resulting in a product of increased volume or weight and lower concentration

Dimensional analysis

A method used to solve complicated pharmaceutical calculations that would require numerous sets of ratio and proportion problems; the main benefit of using is the ability to keep track of units during the process

Drip rate or drop rate

The number of drops (gtt) administered over a specific time by an intravenous infusion (eg, gtt/min)