Geology topics
D. E. Erdmann
Publications and source records attributed to D. E. Erdmann.
Automated ion-selective electrode method for determining fluoride in natural waters
No abstract available.
Azomethine H colorimetric method for determining dissolved boron in water
No abstract available.
Automated determination of bromide in waters by ion chromatography with an amperometric detector
An automated ion chromatograph, including a program controller, an automatic sampler, an integrator, and an amperometric detector, was used to develop a procedure for the determination of bromide in rain water and many ground waters. Approximately 10 min is required to obtain a chromatogram. The detection limit for bromide is 0.01 mg l −1 and the relative standard deivation is <5% for bromide concentrations between 0.05 and 0.5 mg l −1 . Chloride interferes if the chloride-to-bromide ratio is greater than 1 000:1 for a range of 0.01–0.1 mg l −1 bromide; similarly, chloride interferes in the 0.1–1.0 mg l −1 range if the ratio is greater than 5 000:1. In the latter case, a maximum of 2 000 mg l −1 of chloride can be tolerated. Recoveries of known concentrations of bromide added to several samples, ranged from 97 to 110%.
Methods for analysis of inorganic substances in water and fluvial sediments
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