They are useful when sample concentrations may vary by several orders of magnitude and when the value of the analyte must be known with a high degree of accuracy. This experiment does not produce hazardous waste. Procedure Consult your Teaching Assistant for operating instructions for the Buck PFP-7 Flame Photometer. Allow a sufficient warm-up period. Be sure to aspirate deionized-distilled water between samples to clean out the sample tube and aspirator.
Sodium is ubiquitous.
It is imperative that you use scrupulously cleaned glassware to obtain good results. Standard Preparations Prepare sodium chloride standard solutions by volumetric dilution of the stock solution . Be sure to use clean methods. Prepare these standards in scrupulously clean volumetric glassware and transfer the solutions to plastic bottles. Glass often is made from high sodium glass.