Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • Applied Spectroscopy
  • Vol. 24,
  • Issue 6,
  • pp. 583-587
  • (1970)

Spectrographic Determination of Calcium in Latex of Natural Rubber (Hevea brasiliensis)

Not Accessible

Your library or personal account may give you access

Abstract

A cathode layer dc arc method of determining microgram amounts of calcium in latex of <i>Hevea brasiliensis</i> is described. Using lithium carbonate and lanthanum sulphate as buffers, a working curve covering 0.032% to 10.0% Ca in ash of latex can be constructed with palladium as internal standard. Phosphate and silica suppress Ca emission but silica has a considerably greater effect. Of the four matrices examined, the composition with 44.7% K<sub>2</sub>O, 22.3% P<sub>2</sub>O<sub>5</sub>, and 13.4% MgO, which is most representative of the composition of latex ash, gives reproducible Ca values and these are in closest agreement with those obtained by atomic absorption. The spectrographic technique may be extended to simultaneously determine trace amounts of Mn, Fe, Cu, and Si.

PDF Article
More Like This
Spectrographic Determination of Calcium in Microbiological Culture Media

E. John Eastmond
J. Opt. Soc. Am. 36(1) 57-60 (1946)

The Quantitative Spectrochemical Determination of Barium, Strontium, and Calcium*

Werner Hartmann and Betty E. Prescott
J. Opt. Soc. Am. 38(6) 539-541 (1948)

A Method of Spectrographic Analysis of Impurities in Materials for Oxide Coating of Thermionic Cathodes*

T. J. Organ and S. L. Parsons
J. Opt. Soc. Am. 38(2) 191-195 (1948)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved