PL446499A1 - Method of determining calcium cations - Google Patents

Method of determining calcium cations

Info

Publication number
PL446499A1
PL446499A1 PL446499A PL44649923A PL446499A1 PL 446499 A1 PL446499 A1 PL 446499A1 PL 446499 A PL446499 A PL 446499A PL 44649923 A PL44649923 A PL 44649923A PL 446499 A1 PL446499 A1 PL 446499A1
Authority
PL
Poland
Prior art keywords
electrode
concentration
solution
working electrode
calcium cations
Prior art date
Application number
PL446499A
Other languages
Polish (pl)
Inventor
Valentin Mircheski
Kamila Koszelska
Sylwia Smarzewska
Original Assignee
Uniwersytet Łódzki
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Uniwersytet Łódzki filed Critical Uniwersytet Łódzki
Priority to PL446499A priority Critical patent/PL446499A1/en
Publication of PL446499A1 publication Critical patent/PL446499A1/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/28—Electrolytic cell components
    • G01N27/30—Electrodes, e.g. test electrodes; Half-cells
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/416—Systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/416—Systems
    • G01N27/4166—Systems measuring a particular property of an electrolyte
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/18—Water
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/18—Water
    • G01N33/1813—Specific cations in water, e.g. heavy metals

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Pathology (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Investigating Or Analysing Biological Materials (AREA)

Abstract

Przedmiotem zgłoszenia jest sposób oznaczania kationów wapnia, mający zastosowanie w chemii analitycznej. Sposób ten charakteryzuje się tym, że składa się z czterech kroków. W pierwszym kroku należy unieruchomić dopaminę na powierzchni elektrody pracującej. Do naczynia elektrochemicznego (1) wypełnionego roztworem elektrolitu podstawowego, który stanowi roztwór kwasu siarkowego (VI) o stężeniu 0,01 mol/L, wprowadza się kolejno elektrodę platynową, stanowiącą elektrodę pomocniczą, elektrodę chlorosrebrową stanowiącą elektrodę odniesienia, węglową elektrodę dyskową jako elektrodę pracującą oraz roztwór wzorcowy dopaminy tak, by jego stężenie w elektrolicie wynosiło 0,001 mol/L. Rejestruje się 20 woltamperogramów. Po zakończeniu rejestracji woltamperogramów cyklicznych elektrodę pracującą wyjmuje się z naczynia elektrochemicznego (1) i płucze wodą destylowaną, a następnie wyznacza się wartość prądu bazowego unieruchomionego układu typu chinon-hydrochinon znajdującego się w strukturze dopaminy. W kroku trzecim elektrodę pracującą wyjmuje się z naczynia elektrochemicznego (1), płucze wodą destylowaną, suszy i umieszcza się na 5 minut w roztworze kationów wapnia stanowiącym analizowaną próbkę. Wyznaczenie stężenia kationów wapnia odbywa się poprzez wyliczenie różnicy między wartościami przyrostów prądów pików przy potencjale ok 0,5 V uzyskanymi na kroku drugim i czwartym, gdyż jest ona wprost proporcjonalna do stężenia oznaczanych kationów.The subject of the application is a method for determining calcium cations, applicable in analytical chemistry. This method is characterized in that it consists of four steps. In the first step, dopamine should be immobilized on the surface of the working electrode. A platinum electrode, constituting an auxiliary electrode, a silver chloride electrode, constituting a reference electrode, a carbon disc electrode as a working electrode and a standard solution of dopamine are successively introduced into an electrochemical vessel (1) filled with a solution of the basic electrolyte, which is a solution of sulfuric acid (VI) with a concentration of 0.01 mol/L, so that its concentration in the electrolyte is 0.001 mol/L. 20 voltammograms are recorded. After the recording of cyclic voltammograms is completed, the working electrode is removed from the electrochemical vessel (1) and rinsed with distilled water, and then the value of the base current of the immobilized quinone-hydroquinone type system contained in the dopamine structure is determined. In the third step, the working electrode is removed from the electrochemical vessel (1), rinsed with distilled water, dried and placed for 5 minutes in a solution of calcium cations constituting the analyzed sample. The concentration of calcium cations is determined by calculating the difference between the values of the peak current increases at a potential of about 0.5 V obtained in the second and fourth step, because it is directly proportional to the concentration of the determined cations.

PL446499A 2023-10-25 2023-10-25 Method of determining calcium cations PL446499A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL446499A PL446499A1 (en) 2023-10-25 2023-10-25 Method of determining calcium cations

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL446499A PL446499A1 (en) 2023-10-25 2023-10-25 Method of determining calcium cations

Publications (1)

Publication Number Publication Date
PL446499A1 true PL446499A1 (en) 2025-04-28

Family

ID=95554630

Family Applications (1)

Application Number Title Priority Date Filing Date
PL446499A PL446499A1 (en) 2023-10-25 2023-10-25 Method of determining calcium cations

Country Status (1)

Country Link
PL (1) PL446499A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013098709A1 (en) * 2011-12-31 2013-07-04 Koninklijke Philips Electronics N.V. Device and method for measuring metal ions in aqueous solution
CN110988091A (en) * 2019-12-25 2020-04-10 辽宁大学 A method for rapid determination of water hardness by differential pulse method
CN114034687A (en) * 2021-10-29 2022-02-11 中国科学院烟台海岸带研究所 Method and device for detecting calcium ions with high precision

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013098709A1 (en) * 2011-12-31 2013-07-04 Koninklijke Philips Electronics N.V. Device and method for measuring metal ions in aqueous solution
CN110988091A (en) * 2019-12-25 2020-04-10 辽宁大学 A method for rapid determination of water hardness by differential pulse method
CN114034687A (en) * 2021-10-29 2022-02-11 中国科学院烟台海岸带研究所 Method and device for detecting calcium ions with high precision

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