Automatic determination of metals in parenteral solutions by FIA-AS

An automatic lab-made system involving the use of flow injection analysis ( FIA) was designed and constructed for the determination of sodium, potassiu m, calcium, and magnesium in parenteral solutions by flame atomic absorptio n and emission spectrometry. The system carries out the necessary dilutions and addition of spectroscopic buffers as well as data acquisition under so ftware control from a personal computer. Good recoveries, precision and stability were found, suggesting its use for the automation of quality control of parenteral solutions in the pharmaceu tical industry.