Journal ArticleDOI
Lithium ion selective electrodes based on crown ethers for serum lithium assay.
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TLDR
Serum Li/sup +/ assay was successfully achieved with an electrode containing a combination of the optimized membrane based on the crown ether and a dialysis membrane, which eliminated interference by proteins in the samples.Abstract:
Previous Li/sup +/-selective polymeric membrane electrodes based on 14-crown-4 derivative 1 have been improved in the Li/sup +/ selectivities against Na/sup +/ and K/sup +/ by using 2 and 3 as the neutral carrier. Examination of the membrane solvents for the electrodes allowed further enhancement in the Li/sup +/ selectivities. An excellent k/sub LiNa//sup Pot/ value of 1.3 x 10/sup -3/ was attained with the poly(vinyl chloride) membrane containing 2 as the neutral carrier and o-nitrophenyl phenyl ether/tris(2-ethylhexyl) phosphate (98/2) as the solvent. Serum Li/sup +/ assay was successfully achieved with an electrode containing a combination of the optimized membrane based on the crown ether and a dialysis membrane, which eliminated interference by proteins in the samples.read more
Citations
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Selectivity-modifying influence of anionic sites in neutral-carrier-based membrane electrodes
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Polymer Membrane Ion-Selective Electrodes–What are the Limits?
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A new method of measuring cardiac output in man using lithium dilution
TL;DR: Lithium dilution cardiac output (LiDCO) appeared to be a safe, simple and accurate technique which does not require insertion of a pulmonary artery catheter.
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Determination of complex formation constants of 18 neutral alkali and alkaline earth metal ionophores in poly(vinyl chloride) sensing membranes plasticized with bis(2-ethylhexyl)sebacate and o-nitrophenyloctylether
Yu Qin,Yanming Mi,Eric Bakker +2 more
TL;DR: In this paper, a segmented sandwich membrane method is used to determine complex formation constants of 18 electrically neutral ionophores in situ in solvent polymeric sensing membranes, which is typically pH insensitive.
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A paper-based potentiometric cell for decentralized monitoring of Li levels in whole blood
TL;DR: A novel approach to monitor Li levels in blood in decentralized (out of the lab) settings is presented, which uses a potentiometric cell fully made with filter paper as a support and shows an outstanding performance for the direct, fast and low-cost monitoring of Li Levels in blood.
References
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Journal ArticleDOI
Lipophilic crown-4 derivatives as lithium ionophores
TL;DR: Preparation de derives de composes crown-4 a cycles de 13 a 16 membres, en vue d'obtenir des ionophores selectifs du lithium.
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Ion selective liquid membrane electrode for the assay of lithium in blood serum
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The lipophilic macrocyclic polyether 2,3,9,10-dibenzo-1,4,8,11-tetraoxacyclotetradeca-2,9-diene (dibenzo-14-crown-4): a selective ionophore for lithium ions
Journal ArticleDOI
Improved lithium ion-selective electrode based on a lipophilic diamide as neutral carrier
TL;DR: In this paper, a lithium ion-selective solvent polymeric membrane based on the lipophilic diamide N, N, N,N, N', N' and N' was described, and selectivity coefficients for lithium ions over other alkali metal ions are greater than 100 and over alkaline earth metal cations are about 1000.
Journal ArticleDOI
Comparative study of neutral carriers in polymeric lithium ion selective electrodes
Victor P. Y. Gadzekpo,James M. Hungerford,Azza M. Kadry,Yehia A. Ibrahim,Robert Y. Xie,Gary D. Christian +5 more
TL;DR: Preparation de nouveaux composes diamide lipophile et essai comme ionophores pour Li avec des electrodes a membrane de PVC as discussed by the authors, composes a diamide lipidophore and essai.