Home
Resources
Publications
Microfluidic Polymer Chip With an Embedded Ion-Selective Electrode Detector for Nitrate-Ion Assay in Environmental Samples

Microfluidic Polymer Chip With an Embedded Ion-Selective Electrode Detector for Nitrate-Ion Assay in Environmental Samples

Takashi Masadome, Kazuki Nakamura, Daisuke Iijima, Osamu Horiuchi, Benjaporn Tossanaitada, Shin-ichi Wakida, Toshihiko Imato

Anal Sci. 2010;26(4):417-23.

PMID: 20410562

Abstract:

A nitrate ion-selective electrode (NO(3)(-)-ISE) has been developed based on tetradodecylammonium bromide as an anion exchanger and 2-nitrophenyl octyl ether as a plasticizer. The NO(3)(-)-ISE shows an almost Nernstian response to nitrate ion over a concentration range between 1.0 x 10(-6) and 1.0 x 10(-1) M, with an anionic slope of -57.7 +/- 0.7 mV/decade. The selectivity coefficients of the NO(3)(-)-ISE for nitrate ion against chloride and sulfate (log k(NO(3)(-)Cl(-))(pot) = -2.42 and log k(NO(3)(-)SO(4)(2-))(pot) = -4.33) were obtained. A microfluidic polymer chip was fabricated using polystyrene plates and stainless-steel wires as a template for the channel. The microfluidic polymer chip is composed of a mixing chip and a NO(3)(-)-ISE detector chip. The microfluidic polymer chip, integrated with a NO(3)(-)-ISE detector consisting of the NO(3)(-)-ISE and a Na(+)-ISE as a reference electrode, showed an almost Nernstian response to nitrate ion over a concentration range between 1.0 x 10(-5) and 1.0 x 10(-1) M, with an anionic slope of -54.3 +/- 1.3 mV/decade. The microfluidic polymer chip was then applied to the determination of nitrate ion in environmental water samples, such as a tap water, a well-water sample and water for agricultural use.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP63893356	Tetradodecylammonium nitrate		63893-35-6	Price

As a specialist in analytical chemical Products, Alfa Chemistry offers consumers a wealth of raw materials and a full range of technologies and services.

QUICK LINKS

HEADQUARTERS

Tel:

Fax:

Email: