Absolute isotopic abundance ratio and the atomic weight of bromine

Catanzaro, E.J.; Murphy, Thomas J.; Garner, E. L.; Shields, William R.

doi:10.6028/jres.068a.057

Cited by 40 publications

(18 citation statements)

References 12 publications

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“…The minimum and maximum δ 81 Br values of elemental bromine (Fig. 1), calculated from isotope-ratio measurements of [25], are -0.84 and +0.36 ‰ relative to SMOB, but measurement uncertainties were sufficiently large that isotopic abundance variations were not conclusively demonstrated [25]. The lower bound of the standard atomic weight corresponds to bromine in a brominated benzene reagent [28], and the upper bound corresponds to dissolved bromide in saline groundwater from Siberia [27].…”

Section: Brominementioning

confidence: 99%

“…2). The standard atomic weight was determined by combining (1) the best calibrated isotope-ratio measurement of bromine in SRM977 NaBr isotopic reference material [25,26], formerly known as NBS106 [25], (2) the relative isotope-ratio difference between SRM977 and bromide in ocean water [27], and (3) the relative isotope-ratio differences between other materials and ocean-water bromide [2,28]. Bromide in ocean water is isotopically homogeneous and serves as the international measurement standard for bromine [26], standard mean ocean bromide (SMOB).…”

Section: Brominementioning

confidence: 99%

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Atomic weights of the elements 2011 (IUPAC Technical Report)

Wieser

Holden

Coplen

et al. 2013

Pure and Applied Chemistry

356

149

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Abstract:The biennial review of atomic-weight determinations and other cognate data has resulted in changes for the standard atomic weights of five elements. The atomic weight of bromine has changed from 79.904(1) to the interval [79.901, 79.907], germanium from 72.63(1) to 72.630(8), indium from 114.818(3) to 114.818(1), magnesium from 24.3050(6) to the interval [24.304, 24.307], and mercury from 200.59(2) to 200.592(3). For bromine and magnesium, assignment of intervals for the new standard atomic weights reflects the common occurrence of variations in the atomic weights of those elements in normal terrestrial materials.

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Section: Brominementioning

confidence: 99%

Section: Brominementioning

confidence: 99%

Atomic weights of the elements 2011 (IUPAC Technical Report)

Wieser

Holden

Coplen

et al. 2013

Pure and Applied Chemistry

356

149

View full text Add to dashboard Cite

show abstract

“…Previous determinations include silver (1),1 chlorine [2], copper [3], bromine [4], known isotopic composition, prepared from nearly pure separated magnesium isotope . samples.…”

Section: Introductionmentioning

confidence: 99%

Absolute isotopic abundance ratios and atomic weight of magnesium

Catanzaro

Murphy

Garner

et al. 1966

J. RES. NATL. BUR. STAN. SECT. A.

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231

118

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Absolute values have been obtained for the isotopic abundance ratios of magnesium, using surface e mi ss ion mas s spectrometry. Samples of known isotopic composition, prepared from nearly pure se parated magnesium isotopes, we re used to calibrate the mass spectrometers. The resulting abso· lute valu es are 25Mg/24Mg = 0.12663 ± 0.00013 and 26Mg/24Mg = 0 .13932 ± 0.00026, yielding an atomic weight (I2C = 12) of 24.30497 ± 0.00044. The indicated uncertainties are. ove.-. all limits of error based on 95 percent confid e nce li mits for th e mean and allowances for effects of known sources of possible sys te matI c error.

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“…[14] meas' uring the ratios SiCL: 4 Ag and SiBr4: 4 Ag. Based on the isotopic ratios measured by White and Cameron [15] …”

mentioning

confidence: 99%

Absolute isotopic abundance ratios and the atomic weight of a reference sample of silicon

Barnes¹,

Moore²,

Machlan³

et al. 1975

J. RES. NATL. BUR. STAN. SECT. A.

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Ab solute va lu es have been obtained for th e isotopic a bund a nce rati os of a re fe re nce sa mpl e of s ilico n us ing e lec tron impa ct mass s pectrom etry. Sa mpl es of known isoto pi c co mpos it ion pre pared fro m nearly isotop ica lly pure se pa rated sili co n isotopes we re used to ca librate th e ma ss s pectrom e te rs. The res ult ing absolute ,sS i/,JOS i ratio = 29.74320 ± 0.00747 and th e 29S i/,,°S i ratio = 1. 50598 ± 0.00086 whi c h yield at om pe rcen ts of '"S i = 92.229:n . 0.00155. " 'Si =,1.()6982 I 0.00124 and :lIISi = :). 10085 I 0.00074. The atomic weight ca lc ulated from thi s isotopic co mpos ition is 28.085526 · 0.000056. Th e indi cated un ce rtainti es are overall limit s of e rror based o n 95 perce nt confidence limit s for th e mea ns a nd a ll owan ces for th e effec ts of kn ow n sources of poss ibl e s yste ma tic e rror. A study of natura l '"S i/,IIIS i rati o variations re ported in th e literature e xtend s tb e es timat ed un ce rt a int y in th e atomic we ight of natural s ili co n to ' 0.000.39.Key word s: Absolut e ratios; a tomi c we ight: iso topi c abundan ce: s ili co n .• Prese nt aJdrt:ss: Tel edyne Isutopcs. Ti monium. Maryland 2 1200.

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Absolute isotopic abundance ratio and the atomic weight of bromine

Abstract: An absolute value is obtained f Show more

Cited by 40 publications

References 12 publications

Atomic weights of the elements 2011 (IUPAC Technical Report)

Atomic weights of the elements 2011 (IUPAC Technical Report)

Absolute isotopic abundance ratios and atomic weight of magnesium

Absolute isotopic abundance ratios and the atomic weight of a reference sample of silicon

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