Accession Number : ADP004992

Title :   Kitchensink Titrations,

Corporate Author : LAWRENCE LIVERMORE NATIONAL LAB CA

Personal Author(s) : Selig,W. S.

Report Date : JAN 1985

Pagination or Media Count : 11

Abstract : While most laboratories use more and more expensive equipment for their analyse, this speaker insists on delaying progress by using ultrasimple equipment, available in any laboratory, to perform potentiometric titrations. While not all the data presented will be pertinent to the propellants and/or explosives analyst, we hope to demonstrate that established standard methods need not necessarily always be followed. We have used hyperbole in our title to get your attention; we will endeavor to show, however, (and have done so extemporaneously in this forum in the past) that knives, forks, beer cans, pencils can indeed be used as potentiometric sensors. This will be shown for the following titrations: Fluoride vs F-precipitating species such as La(3+), Aluminum vs fluoride (pertinent to propellants), Phosphate vs Pb(2+), La(3+), Ce(3+), Halides vs Ag(+), Sulfate vs Ba(2+) and Pb(2+). Potentiometric titrations can be carried out with very simple equipment: a pH/millivolt meter, a buret, a sensing electrode, and a reference electrode. We investigated metallic sensors such as copper, stainless steel, and aluminum for the potentiometric titration of some common anions: fluoride, halides, sulfate, and orthophosphate.

Descriptors :   *TITRATION, *POTENTIOMETRIC ANALYSIS, *LABORATORY EQUIPMENT, DETECTORS, FLUORIDES, FLUORINE, CHEMICAL PRECIPITATION, ALUMINUM, PHOSPHATES, LANTHANUM, HALIDES, SILVER, SULFATES, CATIONS, PROPELLANTS, SYMPOSIA

Distribution Statement : APPROVED FOR PUBLIC RELEASE