Institucio Catalana De Recerca I Estudis Avancats

Universitat Rovira I Virgili

Fundacio Institut Catala D'investigacio Quimica (iciq)

Universidad Rovira I Virgili (urv)

Tomás De Aquino Guinovart Pavón

Francisco Javier Andrade

Pascal Blondeau

Pau Ballester

Francesc Xavier Rius

Louis Adriaenssens

Daniel Hernandez Alonso

Marta Novell Recasens

A potentiometric cell capable of selectively measuring potassium comprising an ion-selective working electrode composition prepared from a carrier solvent composition comprising between 1.5 and 2.4 mg of Valinomycin, between 0.4 and 0.6 mg of potassium Tetrakis (4-chlorophenyl) borate (KTFPB), between 52.48 and 78.72 mg of Poly(vinylchloride) (PVC), and between 103.52 and 155.28 mg of Bis(2-ethylhexyl) sebacate (DOS) per ml of the carrier solvent in combination with a specially adapted reference electrode. The cell exhibits improved precision in potassium ion determinations and high selectivity for potassium ions over other cations in a sample specimen such as whole blood or saliva. The electrode compositions exhibits improved properties over a long period of time and therefore has greater shelf life.

Point-of care device for the selective detection of potassium

Compounds are of the formula (Ia), (Ib), (Ic), or are stereoisomers thereof, wherein: R1 is hydrogen, (C1-C20)alkyl; (C3-C20)alkenyl; (C3 C20)alkynyl; (C1-C6)alkyl-O&#x2014;; (C3-C20)cycloalkyl; (C1 C20)haloalkyl; (C6-C20)aryl optionally substituted; (C6-C20)heteroaryl optionally substituted; R2 and R2' are hydrogen; (C1-C20)alkyl; (C1-C6)alkyl-O&#x2014;; (C1-C6)haloalkyl; halogen; cyano; and nitro; Z1 to Z4 are diradicals of formula (III) wherein A1 and A2 are O&#x2014; or NR3-, wherein R3 is selected from the group consisting of hydrogen and (C1-C20)alkyl; and G is (C1-C6)alkyl; &#x2014;P(&#x2550;S)R5-; &#x2014;P(&#x2550;O)R4; &#x2014;P(&#x2550;O)(OR4)-; &#x2014;P(&#x2550;O)(NR6R7)-; &#x2014;S(&#x2550;O)2-; S(&#x2550;O)&#x2014;; or &#x2014;C(&#x2550;O)&#x2014;; and Y1 to Y4 are (C1-C8)alkyl; (C3-C7)cycloalkyl; (C6-C20)aryl optionally substituted; or (C6-C20)heteroaryl optionally substituted; and FG1 and FG2 are H, OH, or NHR8.

Calixpyrrole compounds and creatinine-selective electrodes comprising them

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Tarragona, Spain

Tomás De Aquino Guinovart Pavón