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Fluorine in Some CII Biological Reference Samples and Fluorine Losses During Ashing
Author(s) -
TROLL G.,
FARZANEH A.
Publication year - 1980
Publication title -
geostandards newsletter
Language(s) - English
Resource type - Journals
eISSN - 1751-908X
pISSN - 0150-5505
DOI - 10.1111/j.1751-908x.1980.tb00272.x
Subject(s) - ashing , fluorine , chemistry , environmental chemistry , analytical chemistry (journal) , radiochemistry , physics , organic chemistry , quantum mechanics
Twelve different biostandards from the Inter‐Institute Comittee for studying analytical techniques for leaves (CII) contain fluorine in the range of 6 to 37 ppm. It is known that biological samples from areas affected by fluorine emission may contain up to 1000 ppm of F or more. After keeping the reference samples for two hours at 500°C, weight losses between 67 and 78% are observed; the fluorine losses are between 40 and 85%. If conventional analytical techniques are used, an ashing procedure is necessary before the samples could be fused. By using pyrohydrolytical technique the ashing step is omitted and, hence, any loss of fluorine can be avoided.