1957
DOI: 10.1021/ac60125a028
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Applications of Anion Exchange Resins to Determination of Boron

Abstract: B. Further proof that dirtier is not extracted by the vacuum-extraction method was obtained by placing a known amount of purified dimer in a sample tube and vacuum-extracting it for 2 hours at 200°C. and at 1 mm. of mercury pressure. This procedure did not remove any detectable amount of dimer from the sample tube, as determined by weight loss of the sample tube, and no condensed material was found in the cold trap.Because vacuum extraction will not extract dimer from polymer samples, whereas water extraction… Show more

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Cited by 25 publications
(7 citation statements)
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“…A stock solution containing 1 mg of iron per ml was diluted to obtain working solutions containing 5 gg and 1 gg of iron per ml. For equilibrium studies and some recovery experiments, radioactive iron cyclohexanebutyrate was synthesized from cyclohexanebutyric acid and ferric chloride containing radioactive iron-59, following essentially the directions of Isbell et al (5). A solution containing 5 gg of iron per ml was prepared by dissolving 30 mg of the product in chloroform and diluting to 1 liter.…”
mentioning
confidence: 99%
“…A stock solution containing 1 mg of iron per ml was diluted to obtain working solutions containing 5 gg and 1 gg of iron per ml. For equilibrium studies and some recovery experiments, radioactive iron cyclohexanebutyrate was synthesized from cyclohexanebutyric acid and ferric chloride containing radioactive iron-59, following essentially the directions of Isbell et al (5). A solution containing 5 gg of iron per ml was prepared by dissolving 30 mg of the product in chloroform and diluting to 1 liter.…”
mentioning
confidence: 99%
“…The titrimetric determination of boron requires the complete separation of boron from hydrolyzable cations and weak acids. Distillation of methyl borate (4), ion exchange (10), and electrochemical separations (12) are more appropriate to the removal of metallic interferences than to separation of boron from silicic acid, although Wolszon, Hayes, and Hill (15) remove most of the silica from a glass sample by precipitating it hydrolytically in a cation resin bed during the separation of metals. Blumenthal's BaCOs method (2) has been used on various boride materials to remove silicates and heavy metals.…”
mentioning
confidence: 99%
“…Of the various separative techniques employed, ion exchange, extraction, and distillation procedures have shown general applicability. Ion exchange methods, however, are not recommended for the separation of small amounts of boron (7). The recently developed solvent extraction method (4,5) can only be applied to steels and high temperature alloys that are soluble in H2SO< or HiSOf-HiPOi mixture.…”
mentioning
confidence: 99%
“…Calcium Hydroxide Suspension. The suspension was prepared as outlined in ASTM Methods for Chemical Analysis of Metals (7).…”
mentioning
confidence: 99%
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