H. J. Keily, A. Eldridge, J. O. Hibbits
1959
Citations
0
Influential Citations
5
Citations
Journal
Analytica Chimica Acta
Abstract
Abstract A study of the purity and uniformity of composition of commercially available ferrous ammonium sulfate hexahydrate has been undertaken to determine its suitability as a solid standard reductant. Weighed quantities of reagent-grade Mohr's salt were added in slight excess to solutions of known weights of primary standard potassium dichromate. An amperometric titration was then used to measure the excess ferrous ion. Results found indicate that present-day manufacturing processes have sufficiently improved the quality of the available analytical reagent to permit its use as a secondary-standard solid reductant.