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Study on the Method of Determining Aluminum Content in Compound Aluminum Hyclroxide Tablets

Jia Jian-bin

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Abstract

The study on the method of determining aluminum content in compound aluminum hyclroxide tablets was conducted.The sample was digesting,the Al3+ was deposited as Al(OH)3 with thin solution of NaOH,while that remains pH 7～8.Then,KF was added and dissociated KOH was released.With phenolphthalein as the indicator and HCl as the standard solution,dissociated KOH was titrated to end point.The recovery of standard addition was between 96.8% and 100.1%,and the relative standard deviation of determination result was 1.0 %.The results showed that the improved method was a facility-operating way with the fast determination.The accuracy and precision of this method accorded with those of national standard method.

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What this paper is about

The study on the method of determining aluminum content in compound aluminum hyclroxide tablets was conducted.The sample was digesting,the Al3+ was deposited as Al(OH)3 with thin solution of NaOH,while that remains pH 7～8.Then,KF was added and dissociated KOH was released.With phenolphthalein as the indicator and HCl as the standard solution,dissociated KOH was titrated to end point.The recovery of standard addition was between 96.8% and 100.1%,and the relative standard deviation of determination result was 1.0 %.The results showed that the improved method was a facility-operating way with the fast determination.The accuracy and precision of this method accorded with those of national standard method.

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Available abstract

The study on the method of determining aluminum content in compound aluminum hyclroxide tablets was conducted.The sample was digesting,the Al3+ was deposited as Al(OH)3 with thin solution of NaOH,while that remains pH 7～8.Then,KF was added and dissociated KOH was released.With phenolphthalein as the indicator and HCl as the standard solution,dissociated KOH was titrated to end point.The recovery of standard addition was between 96.8% and 100.1%,and the relative standard deviation of determination result was 1.0 %.The results showed that the improved method was a facility-operating way with the fast determination.The accuracy and precision of this method accorded with those of national standard method.

Key concepts: Relative standard deviation, Phenolphthalein, Aluminium, Standard addition, National standard, Standard solution, Chemistry, Chromatography

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