Gelation with N-lauroyl-L-glutamic-α,γ-dibutylamide for liquid scintillation counting of low specific activities of35S and32P

The 35S content in atmospheric deposition, aerosol and rain water was determined about every 10 days for a year with 7Be, 32p and some stable elements. Average 35S concentrations were l l0mBq-m-2-d -1 for atmospheric deposition, 0.078 mBq.m -3 for aerosol in surface air and 45 mBq-I -j for rain water. The ratios of 7Be/35S were abnormally low, although most of 32p/TBe showed the reasonable values corresponding to the residence times from 10 to 60 days. The excess 35S suggests an external source 0f35S or/and a faster cycle of 35S than that of TBe and 32p.

show abstract

Atmospheric deposition of35S

Osaki

Tagawa

Chijiiwa

et al. 1999

J Radioanal Nucl Chem

Self Cite

View full text Add to dashboard Cite

show abstract

Simple measurement of14C in the environment using a gel suspension method

Wakabayashi

Ohura

Okai

et al. 1999

J Radioanal Nucl Chem

View full text Add to dashboard Cite

A simple analytical method for environmental 14C with a low background liquid scintillation counter was developed. We used a new gelling agent, N-lauroyl-L-glutamic-tx,T-dibutylamide, for the liquid scintillation counting of 14C as CaCO 3 (gel suspension method). Our procedure for sample preparation was much simpler than that of conventional methods and required no special equipment. The samples prepared with the standard sample of CaCO 3 were measured to evaluate the self absorption of the sample, the optimum condition of counting and the detection limit. Our results indicated that the newly developed technique could be efficiently applied for the monitoring of environmental 14C.

show abstract

Stability and reproducibility of gel-suspension samples for the liquid scintillation counting of14C using N-lauroyl-L-glutamic-α,γ-dibutylamide

Wakabayashi

Ohura

Okai

et al. 1999

J Radioanal Nucl Chem

View full text Add to dashboard Cite

Stability and reproducibility of gel-suspension samples were investigated in order to evaluate the characteristic feature of the gel-suspension method for J4C activity measurement. Commercially available gelling agent, N-lauroyl-L-glutamic-c~,~'-dibutylamide, was used for the gelformation of the samples. No change of the counting rate for the gel-suspension sample was observed for more than 2 years after the sample preparation. Four samples used for checking the reproducibility of the sample preparation method. The same values were obtained for the counting rate of 14C activity within the counting error. No change of the counting rate was observed for the "re-gelated" sample. These results show that the gel-suspension method is appropriate for the 14C activity measurement by the liquid scintillation method and is useful for a long-term preservation of the sample for repeated measurement.

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Gelation with N-lauroyl-L-glutamic-α,γ-dibutylamide for liquid scintillation counting of low specific activities of35S and32P

Cited by 3 publications

References 5 publications

Atmospheric deposition of35S

Atmospheric deposition of35S

Simple measurement of14C in the environment using a gel suspension method

Stability and reproducibility of gel-suspension samples for the liquid scintillation counting of14C using N-lauroyl-L-glutamic-α,γ-dibutylamide

Contact Info

Product

Resources

About