INFRARED DETERMINATION OF INORGANIC SULFATES AND CARBONATES BY THE PELLET TECHNIQUE
Abstract
The infrared spectra of sulfates and carbonates in the solid state are discussed. Methods are proposed for the determination of single sulfates (barium, strontium, sodium, and potassium sulfates) by the pellet technique. The peaks recommended for barium and strontium sulfates are 983/cm and 993/cm, respectively. Sodium and potassium sulfates are both measured at 619/cm. A procedure is proposed for the determination of barium and strontium sulfates in the presence of each other by measurements at 983/cm and 993/cm, respectively. Methods are proposed for the determination of single carbonates (barium, strontium, and calcium carbonates) by the pellet technique. Measurements for the barium, strontium, and calcium carbonates are made at 693/cm, 704/cm, and 712/cm, respectively. The procedure cannot be used for the determination of sodium or potassium carbonates because of the hygroscopicity of these compounds. A procedure is described for the determination of barium, strontium, and calcium carbonates in the presence of each other by measuring the peak heights at 693/cm, 704/cm (or 698/cm), and 712/cm, respectively. The methods for the determination of barium and strontium sulfates in the presence of each other, and barium, strontium, and calcium carbonates in the presence of each other can be used down a concentration of 5% for the minor constituent. For lower percentages the errors are rather large.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1969
- Accession Number
- AD0700126
Entities
People
- David E. Chasan
- George Norwitz
Organizations
- Frankford Arsenal