Dampfdichte und Schmelzpunkt des Jodcyans

Seubert, Karl; Pollard, W.

doi:10.1002/cber.189002301175

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1892

2003

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“…The reaction of iodine with cyanide is well-known, and papers dealing with this subject date back to the end of the last century (4) and the early parts of this century (5)(6)(7). The equilibrium I2 + HCN ?=• H+ + + ICN (1) is pH dependent (K = 0.73 (8)), and the pH dependence is the basis of the determination developed herein.…”

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confidence: 99%

Pneumatoamperometric determination of nanogram amounts of cyanide

Béran¹,

Bruckenstein²

1980

Anal. Chem.

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Part-per-billion levels of cyanide react rapidly and quantitatively with excess Iodine at pH ~6.0 to form Iodine cyanide. The excess Iodine Is selectively removed from solution by nitrogen purging. Acidification of the resultant iodine cyanide solution with perchloric acid In the presence of iodide to a final concentration of 3.0 M HCI04 and 1.0 X 10~4 rapidly and quantitatively regenerates Iodine in an amount equivalent to the original cyanide. This iodine is transferred to the gas phase by purging with nitrogen, where It Is determined at a gold gas porous electrode by electro-oxidation to lodate. The detection limit for cyanide is estimated to be 5 ng In a 4-mL sample.

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confidence: 99%