English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

A study of the critical factors in the colorimetric determination 1 i of total iron in silicate and phosphate rocks, and in other nonmetallic materials is presented. Sit was desired to ascertain the wavelength of maximum absorbancy, the optimum concentration range for iron, the effect i of different substances on the ferrous-o-phenanthroline system, and reproduclbility of results. The sample is decomposed -with KF'ENOs'HCHU in platinum, and the iron is determined colorimetrically -with o-phenanthroline Fo separations are made. Accurate results are obtained on a variety of materials.

The colorimetric determination of total iron with o-phenanthroline : a spectrophotometric study