摘要
In this work, the development of flow system that is simple, precise and accurate for determining fluoride in mouthwash is described. The determination of fluoride was based on the on-line formation of a Fe(III)-salicylate complex, which is consumed in the presence of fluoride, generating the colourless hexafluoroferrate(III) complex ion, [FeF6](3-). The proposed procedure exhibits a linear concentration range of 8.0 x 10(-5)-1.2 x 10(-3) mol L-1, a detection limit of 3.5 x 10(-5) mol L-1, a higher sampling frequency of 44 h(-1) and relative standard deviations below 0.2%. The interference of the red colour of the samples was removed using waste-seed specimens of Mabea fistulifera Mart. as a biosorbent material.
- 出版日期2014