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J Dent Res 22(2): 123-127, 1943
© 1943 International and American Associations for Dental Research
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A NEW MICRO-METHOD FOR THE DETERMINATION OF FLUORIDES

SAUL M. BIEN B.A., D.D.S.1

1 New York State Psychiatric Institute and Hospital, New York, N. Y.

By this method, the accurate micro-quantitative determination of fluorine can be made in the range of 1.0 to 10.0 gamma of fluorine. The determination of fluorine in this range may be done comparatively rapidly, simply and accurately, enabling the analysis of a large number of samples in a minimum of time.

Losses in fluorine, due to distillation and interference from glass and porcelain, have been minimized by combining receiver and flask in a modified Feigl tube.

The addition of indigo carmine to the sodium alizarin sulphonate indicator aids greatly in the determination of the end point.

Submitted on April 27, 1942
Revised on February 23, 1943






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