Determination of hardness in tapwater and upland soil extracts using a long-term stable divalent cation selective electrode based on a lipophilic acrylate resin as a membrane matrix

Manami Numata, Keiko Baba, Akihide Hemmi, Hiromitsu Hachiya, Satoshi Ito, Takashi Masadome, Yasukazu Asano, Satoshi Ohkubo, Tomonori Gomi, Toshihiko Imato, Toshiyuki Hobo

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

A divalent cation-selective electrode, which utilizes a lipophilic resin as a matrix for the sensing membrane, and which has long-term stability has been developed. The sensing membrane is a lipophilic acrylate resin which is impregnated with a solution of 1-decylalcohol and the calcium salt of bis[4-(1,1,3,3-tetramethylbutyl) phenyl] phosphate at concentrations of 0.08 g ml-1 each. The electrode exhibited nearly equal selectivity to Ca2+ and Mg2+ ions and could be used as a water hardness sensor. The electrode shows a Nernstian response with a slope of 29 mV decade-1 to both Ca2+ and Mg2+ ions in the concentration range from 10-5 M to 10-1 M and could be used in the pH range from 3 to 10 for the determination of 10-3 M Ca2+ and Mg2+ solutions. The initial performance of the electrode could be maintained for 1 year, since the lifetime test of the electrode was conducted in tapwater at a continuous flow rate of 4 ml min-1. The hardnesses of tapwater and upland soil extracts were determined using the developed electrode and the analytical results were in good agreement with those obtained by chelatometric titration using an EDTA solution as the titrant. A coefficient factor of correlation 0.998 was obtained between the electrode method and titrimetry. The long-term stability of the electrode was found to be due to strong affinity of 1-decylalcohol to the lipophilic acrylate resin.

Original languageEnglish
Pages (from-to)449-457
Number of pages9
JournalTalanta
Volume55
Issue number3
DOIs
Publication statusPublished - 2001 Sep 13
Externally publishedYes

Fingerprint

Divalent Cations
Resins
Hardness
Membranes
Soils
Electrodes
Water hardness
Ions
acrylic acid
Titration
Edetic Acid
Salts
Phosphates
Flow rate
Calcium
Sensors

Keywords

  • Divalent cation
  • Lipophilic acrylate resin matrix
  • Long-term stability
  • Potentiometry
  • Tapwater hardness
  • Upland soil diagnosis

ASJC Scopus subject areas

  • Analytical Chemistry
  • Spectroscopy

Cite this

Determination of hardness in tapwater and upland soil extracts using a long-term stable divalent cation selective electrode based on a lipophilic acrylate resin as a membrane matrix. / Numata, Manami; Baba, Keiko; Hemmi, Akihide; Hachiya, Hiromitsu; Ito, Satoshi; Masadome, Takashi; Asano, Yasukazu; Ohkubo, Satoshi; Gomi, Tomonori; Imato, Toshihiko; Hobo, Toshiyuki.

In: Talanta, Vol. 55, No. 3, 13.09.2001, p. 449-457.

Research output: Contribution to journalArticle

Numata, Manami ; Baba, Keiko ; Hemmi, Akihide ; Hachiya, Hiromitsu ; Ito, Satoshi ; Masadome, Takashi ; Asano, Yasukazu ; Ohkubo, Satoshi ; Gomi, Tomonori ; Imato, Toshihiko ; Hobo, Toshiyuki. / Determination of hardness in tapwater and upland soil extracts using a long-term stable divalent cation selective electrode based on a lipophilic acrylate resin as a membrane matrix. In: Talanta. 2001 ; Vol. 55, No. 3. pp. 449-457.
@article{dc33a485ebd547da8cccf29a07cfef52,
title = "Determination of hardness in tapwater and upland soil extracts using a long-term stable divalent cation selective electrode based on a lipophilic acrylate resin as a membrane matrix",
abstract = "A divalent cation-selective electrode, which utilizes a lipophilic resin as a matrix for the sensing membrane, and which has long-term stability has been developed. The sensing membrane is a lipophilic acrylate resin which is impregnated with a solution of 1-decylalcohol and the calcium salt of bis[4-(1,1,3,3-tetramethylbutyl) phenyl] phosphate at concentrations of 0.08 g ml-1 each. The electrode exhibited nearly equal selectivity to Ca2+ and Mg2+ ions and could be used as a water hardness sensor. The electrode shows a Nernstian response with a slope of 29 mV decade-1 to both Ca2+ and Mg2+ ions in the concentration range from 10-5 M to 10-1 M and could be used in the pH range from 3 to 10 for the determination of 10-3 M Ca2+ and Mg2+ solutions. The initial performance of the electrode could be maintained for 1 year, since the lifetime test of the electrode was conducted in tapwater at a continuous flow rate of 4 ml min-1. The hardnesses of tapwater and upland soil extracts were determined using the developed electrode and the analytical results were in good agreement with those obtained by chelatometric titration using an EDTA solution as the titrant. A coefficient factor of correlation 0.998 was obtained between the electrode method and titrimetry. The long-term stability of the electrode was found to be due to strong affinity of 1-decylalcohol to the lipophilic acrylate resin.",
keywords = "Divalent cation, Lipophilic acrylate resin matrix, Long-term stability, Potentiometry, Tapwater hardness, Upland soil diagnosis",
author = "Manami Numata and Keiko Baba and Akihide Hemmi and Hiromitsu Hachiya and Satoshi Ito and Takashi Masadome and Yasukazu Asano and Satoshi Ohkubo and Tomonori Gomi and Toshihiko Imato and Toshiyuki Hobo",
year = "2001",
month = "9",
day = "13",
doi = "10.1016/S0039-9140(01)00421-0",
language = "English",
volume = "55",
pages = "449--457",
journal = "Talanta",
issn = "0039-9140",
publisher = "Elsevier",
number = "3",

}

TY - JOUR

T1 - Determination of hardness in tapwater and upland soil extracts using a long-term stable divalent cation selective electrode based on a lipophilic acrylate resin as a membrane matrix

AU - Numata, Manami

AU - Baba, Keiko

AU - Hemmi, Akihide

AU - Hachiya, Hiromitsu

AU - Ito, Satoshi

AU - Masadome, Takashi

AU - Asano, Yasukazu

AU - Ohkubo, Satoshi

AU - Gomi, Tomonori

AU - Imato, Toshihiko

AU - Hobo, Toshiyuki

PY - 2001/9/13

Y1 - 2001/9/13

N2 - A divalent cation-selective electrode, which utilizes a lipophilic resin as a matrix for the sensing membrane, and which has long-term stability has been developed. The sensing membrane is a lipophilic acrylate resin which is impregnated with a solution of 1-decylalcohol and the calcium salt of bis[4-(1,1,3,3-tetramethylbutyl) phenyl] phosphate at concentrations of 0.08 g ml-1 each. The electrode exhibited nearly equal selectivity to Ca2+ and Mg2+ ions and could be used as a water hardness sensor. The electrode shows a Nernstian response with a slope of 29 mV decade-1 to both Ca2+ and Mg2+ ions in the concentration range from 10-5 M to 10-1 M and could be used in the pH range from 3 to 10 for the determination of 10-3 M Ca2+ and Mg2+ solutions. The initial performance of the electrode could be maintained for 1 year, since the lifetime test of the electrode was conducted in tapwater at a continuous flow rate of 4 ml min-1. The hardnesses of tapwater and upland soil extracts were determined using the developed electrode and the analytical results were in good agreement with those obtained by chelatometric titration using an EDTA solution as the titrant. A coefficient factor of correlation 0.998 was obtained between the electrode method and titrimetry. The long-term stability of the electrode was found to be due to strong affinity of 1-decylalcohol to the lipophilic acrylate resin.

AB - A divalent cation-selective electrode, which utilizes a lipophilic resin as a matrix for the sensing membrane, and which has long-term stability has been developed. The sensing membrane is a lipophilic acrylate resin which is impregnated with a solution of 1-decylalcohol and the calcium salt of bis[4-(1,1,3,3-tetramethylbutyl) phenyl] phosphate at concentrations of 0.08 g ml-1 each. The electrode exhibited nearly equal selectivity to Ca2+ and Mg2+ ions and could be used as a water hardness sensor. The electrode shows a Nernstian response with a slope of 29 mV decade-1 to both Ca2+ and Mg2+ ions in the concentration range from 10-5 M to 10-1 M and could be used in the pH range from 3 to 10 for the determination of 10-3 M Ca2+ and Mg2+ solutions. The initial performance of the electrode could be maintained for 1 year, since the lifetime test of the electrode was conducted in tapwater at a continuous flow rate of 4 ml min-1. The hardnesses of tapwater and upland soil extracts were determined using the developed electrode and the analytical results were in good agreement with those obtained by chelatometric titration using an EDTA solution as the titrant. A coefficient factor of correlation 0.998 was obtained between the electrode method and titrimetry. The long-term stability of the electrode was found to be due to strong affinity of 1-decylalcohol to the lipophilic acrylate resin.

KW - Divalent cation

KW - Lipophilic acrylate resin matrix

KW - Long-term stability

KW - Potentiometry

KW - Tapwater hardness

KW - Upland soil diagnosis

UR - http://www.scopus.com/inward/record.url?scp=0035855949&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0035855949&partnerID=8YFLogxK

U2 - 10.1016/S0039-9140(01)00421-0

DO - 10.1016/S0039-9140(01)00421-0

M3 - Article

AN - SCOPUS:0035855949

VL - 55

SP - 449

EP - 457

JO - Talanta

JF - Talanta

SN - 0039-9140

IS - 3

ER -