Flame‐photometric determination of calcium in plants

Publisher Website
Google Scholar
Abstract
In the flame photometric estimation of calcium, phosphorus and sulphur cause interference which seriously affects the validity of the results. Hitherto it has been necessary to separate these interfering ions, but this is time‐consuming. It is now shown that at high concentrations of either phosphate or sulphate ions, the calcium emission is independent of small variations of either anion. This is used as the basis of a flame‐photometric method for estimating calcium in plants without separation of interfering ions, but in the presence of excess of sulphate.