Precise NMR Method for Titering Organometal Reagents

2021 ◽  
Author(s):  
Vineet K. Jakhar ◽  
Eric C. Johnson ◽  
Aditya Kavuturu ◽  
Jessica K. Heller ◽  
Adam S. Veige ◽  
...  
Keyword(s):  
Nmr Method

Sequential injection analysis coupled to on-line benchtop proton NMR: Method development and application to the determination of synthetic cathinones in seized drug samples

Talanta ◽  
2021 ◽  
Vol 231 ◽  
pp. 122355
Author(s):  
Timothy J. Trinklein ◽  
Malati Thapa ◽  
Lexie A. Lanphere ◽  
John A. Frost ◽  
Sandra M. Koresch ◽  
...  
Keyword(s):  
Method Development ◽  
Proton Nmr ◽  
Synthetic Cathinones ◽  
Sequential Injection Analysis ◽  
Sequential Injection ◽  
Nmr Method ◽  
On Line

Determination of the structure of certain 1,3-dioxane derivatives of furan by the NMR method

1969 ◽  
Vol 10 (2) ◽  
pp. 220-224
Author(s):  
Yu. Yu. Samitov ◽  
Z. I. Zelikman ◽  
V. G. Kul'nevich
Keyword(s):  
Nmr Method ◽  
Derivatives Of

A two-dimensional NMR method for assignment of deoxyribose proton NMR signals in d(ApGpCpT)

1984 ◽  
Vol 121 (3) ◽  
pp. 1021-1026 ◽  
Author(s):  
Kofen Lai ◽  
Dinesh O. Shah ◽  
Eugene DeRose ◽  
David G. Gorenstein
Keyword(s):  
Proton Nmr ◽  
Two Dimensional ◽  
Nmr Method ◽  
Nmr Signals

Polyhydroxyalkanoate quantification in organic wastes and pure cultures using a single-step extraction and 1H NMR analysis

2012 ◽  
Vol 66 (5) ◽  
pp. 1000-1006 ◽  
Author(s):  
Elisabeth Linton ◽  
Asif Rahman ◽  
Sridhar Viamajala ◽  
Ronald C. Sims ◽  
Charles D. Miller
Keyword(s):  
1H Nmr ◽  
Azotobacter Vinelandii ◽  
Nile Blue ◽  
Agricultural Waste ◽  
Accurate Method ◽  
Single Step ◽  
Proton Nuclear Magnetic Resonance ◽  
Copolymer Composition ◽  
Nmr Analysis ◽  
Nmr Method

In this study, a proton nuclear magnetic resonance (1H NMR) method was developed to quantitatively analyze polyhydroxyalkanoate (PHA) content in Cupriavidus necator H16, Azotobacter vinelandii AvOP, and mixed microbial cultures from the effluent of an agricultural waste treatment anaerobic digester. In contrast to previous methods, a single-step PHA extractive method using deuterated chloroform was established, thereby facilitating direct 1H NMR analysis. The accuracy of the method was verified through comparison with well-established gas chromatography (GC) methanolysis techniques. Nile blue fluorescence staining was also carried out to serve as an independent and qualitative indicator of intracellular PHA content. The results indicate that the 1H NMR method is appropriate for rapid and non-destructive quantification of overall PHA content and determination of PHA copolymer composition in a variety of cultures. Notably, this technique was effective in measuring PHA content in full-strength waste samples where high concentrations of background impurities and organic compounds are present. The straightforward procedures minimize error-introducing steps, require less time and materials, and result in an accurate method suitable for routine analyses.

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