Abstract

This paper describes a reliable emission spectrographic method capable of quantitatively determining boron in the 0.5 to 50 ppm range. The detection limit for the method is 0.1 ppm. Previous to this report no reliable method was available for the accurate determination of boron in reagent 40% ammonium fluoride solution in the ppm range; consequently, no incoming inspection or manufacturer's certification was available for boron content. Analysis of representative ammonium fluoride samples shows that the boron level is less than 0.1 ppm, suggesting that this element may not be a major problem in ammonium fluoride reagent.

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