Study of Barium-barium Sulfate Gravimetric Primary Method

In order to develop the barium-barium sulfate(Ba2+-BaSO4) gravimetric method to a practical primary method,The barium solution,which concentration is 20mg/g,was selected as the researching solution. The barium concentration and the value of the factors of uncertainty were determined by gravimetric method coupled with instrumental analysis.The result was discussed and it has shown the repeatability and uncertainty of gravimetric method coupled with instrumental analysis was improved significantly compare to gravimetric method alone.The expanded uncertainty is 0.08 %(k=2).