Production and analysis of special high-purity acids purified by subboiling distillation

Kuehner, Edwin C.; Alvarez, Robert; Paulsen, Paul J.; Murphy, Thomas J.

doi:10.1021/ac60320a016

Cited by 286 publications

(124 citation statements)

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“…The following conditions were employed: eluent, 3 mmol/L NaHCO and 2 mmol/L^2 00^5 flow rate 2.5-3 mL/min. ; suppressor column regenerated with H^SO^.…”

Section: Combustionmentioning

confidence: 99%

“…Approximately 1 yg of S enriched tracer per 3 yg natural S was added by weight to each sample followed by 10 g of HNO^and 4g HC1. The acids and water used in these procedures were produced at NBS by subboiling distillation [3] unless otherwise noted. The tubes were cooled immediately to -78°C in a C0 2 -CC1^-CHC1 3 slush and sealed with a gas-oxygen torch.…”

Section: Experimental Procedures Sample Preparation and Dissolutionmentioning

confidence: 99%

“…T m he National Bureau of Standards' was established by an act of Congress on March 3,1901. The M Bureau's overall goal is to strengthen and advance the nation's science and technology and facilitate their effective application for public benefit.…”

mentioning

confidence: 99%

“…The M Bureau's overall goal is to strengthen and advance the nation's science and technology and facilitate their effective application for public benefit. To this end, the Bureau conducts research and provides: (1) a basis for the nation's physical measurement system, (2) scientific and technological services for industry and government, (3) a technical basis for equity in trade, and (4) (February 1978). $2.20* SNO03-O03-0 18864 Cali, J. P. and Plebanski, T., Guide to United States Reference Materials, NBS Spec.…”

mentioning

confidence: 99%

“…x 10 (3) where the numerator equals the moles of S times the atomic weight of sulfur and the denominator equals the fractional abundance of S ( A) in the sample times the sample weight in grams.…”

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confidence: 99%

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Gills¹

1984

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“…The following conditions were employed: eluent, 3 mmol/L NaHCO and 2 mmol/L^2 00^5 flow rate 2.5-3 mL/min. ; suppressor column regenerated with H^SO^.…”

Section: Combustionmentioning

confidence: 99%

Section: Experimental Procedures Sample Preparation and Dissolutionmentioning

confidence: 99%

mentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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Standard Reference Materials :

Gills¹

1984

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Complexation of Triorganotin Derivatives of [18]Crown-6- and [15]Crown-5-(benzo-4-carboxylate) with Alkali Thiocyanates

et al. 2001

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Investigations of the simultaneous complexation of tri-n-butyltin and triphenyltin derivatives of [18]crown-6- or [15]crown-5-(benzo-4-carboxylate) by the anion and cation from NaSCN or KSCN are reported. The crystal structure of [Na+ is included in [15]crown-5-C6H3-4-COOSn(C6H5)3NCS]-], 4 NaSCN, displays an unusual zwitterionic nature with one intramolecular charge separation characterized by an Na-Sn distance of 9.29(1) A, and several intermolecular charge separations, the shortest being 5.48(1) A. Similar distances (9.70(2), 9.28(2), intramolecular; 5.40(2) and 5.41(2) A, shortest intermolecular) are observed in the more complicated structure of the corresponding [18]crown-6-(benzo-4-carboxylate) derivative, 3 NaSCN, with two independent molecules in the asymmetric unit. For the tri-n-butyltin analogues 1 and 2, complex equilibria were observed in acetone and unraveled by variable temperature 13C, 117Sn. and 23Na NMR studies. Their complexes with KSCN and NaSCN undergo decomposition in acetone solution, as evidenced by the transformation of [K+ is included in [18]crown-6-[C6H3-4-COOSn(nBu)3NCS]-], into tri-n-butyltin isothiocyanate and a novel dimeric potassium [18]crown-6-(benzo-4-carboxylate), the structure of which was elucidated by X-ray diffraction analysis.

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