ABSOLUTE ISOTOPIC ABUNDANCE RATIO AND THE ATOMIC WEIGHT OF SILVER

Journal Article · Sat Oct 01 04:00:00 EDT 1960 · Journal of the American Chemical Society (U.S.)

DOI:https://doi.org/10.1021/ja01504a005· OSTI ID:4133626

Shields, W R; Craig, D N; Dibeler, V H

An absolute value for the isotopic abundance ratio of natural silver was obtained by the use of isotopic standards prepared from nearly pure separated silver isotopes. Mass spectrometric data resulted in a value for the ratio (Ag/ sup 107//Ag/sup 109/ = l.0754/sub 7/ plus or minus 0.0013). Within the sta ted limits, no variation in natural abundance was found among six samples of native silver and commercial silver nitrate. A seventh native silver sample, obtained from Cobalt, Ontario, showed a statistically significant deviation. The calculated physical and chemical atomic weights of silver are respectively. On the recently proposed unified physcial and chemical atomic weight scale (C/sup 12/ = 12), the atomic weight is 107.8685 plus or minus 0.0013. The indicated uncertainties are overall limits of error based on 95% coafidence limits for the mean and on allowances for effects of known sources of possible systematic error. (auth)

• Research Organization: National Bureau of Standards, Washington, D.C.
• Sponsoring Organization: USDOE
• NSA Number: NSA-15-000215
• OSTI ID: 4133626
• Journal Information: Journal of the American Chemical Society (U.S.), Journal Name: Journal of the American Chemical Society (U.S.) Vol. Vol: 82; ISSN JACSA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ATOMS
CHEMISTRY
ISOTOPES
MASS SPECTROMETERS
PREPARATION
QUANTITY RATIO
SEPARATION PROCESSES
SILVER
SILVER 107
SILVER 109
SILVER NITRATES
STANDARDS
USES
WEIGHT