1980 年 5 月 18 日至 21 日，圣海伦斯火山喷发物中的氟化物分布和生物可利用性。

Fluoride distribution and biological availability in the fallout from mount st. Helens, 18 to 21 may 1980.

出版信息

Science. 1980 Dec 19;210(4476):1352-4. doi: 10.1126/science.210.4476.1352.

DOI:10.1126/science.210.4476.1352

Abstract

Concentrations of fluoride in the ash fallout in central Washington from the 18 May 1980 eruption of Mount St. Helens varied severalfold, but none are high enough to constitute any immediate hazard to animal life. The heaviest fallout (Moses Lake) contained 113 parts per million (ppm) of acid-labile fluoride, but of this only 11 ppm was water-soluble and 20 ppm was available to rats. The fluoride concentrations in the urine of cattle feeding for 4 days on hay contaminated with this ash were essentially normal. Samples of ash from other areas generally had higher concentrations of acid-labile fluoride but lower concentrations of water-soluble fluoride. The concentration of water-soluble fluoride was inversely correlated with the coarseness of the fallout.

摘要

来自华盛顿中部的 1980 年 5 月 18 日圣海伦火山爆发的灰烬中的氟化物浓度有几倍的变化，但没有一个浓度高到对动物生命构成任何直接危害。最重的沉降物（摩西湖）含有 113 百万分率（ppm）的酸不稳定氟化物，但其中只有 11 ppm 是水溶性的，20 ppm 对老鼠是可用的。在被这种灰烬污染的干草上喂养 4 天的牛的尿液中的氟化物浓度基本正常。来自其他地区的灰烬样本通常具有更高的酸不稳定氟化物浓度，但水溶性氟化物浓度较低。水溶性氟化物的浓度与沉降物的粗糙程度成反比。