Laboratoire de Chimie Physique, UMR 8000, CNRS, Université Paris-Sud, Bâtiment 350, 91405 Orsay Cedex, France.
Talanta. 2010 Mar 15;80(5):2132-40. doi: 10.1016/j.talanta.2009.11.020. Epub 2009 Nov 13.
A nitrite sensor based on immobilized Dawson-type tungstophosphate alpha-K(7)[H(4)PW(18)O(62)].18H(2)O (PW(18)) in multilayers of charged polyelectrolyte poly(allylamine hydrochloride) (PAH) on a glassy carbon electrode is described. A nitrite sensor manufactured with 10 layers has a sensitivity of approximately 4 nA/microM nitrite, fast response time (<6s), low detection limit ( approximately 0.1 microM), high selectivity towards endogenous interferences such as nitrate and molecular oxygen, a linear range from 0.1 microM to at least 20mM nitrite and was stable for at least 2 months. In addition, such nitrite sensors can operate in a pH range from 1 to 9, and the sensitivity can be increased by increasing the number of layers at the expense of increasing the response time.
基于固定化 Dawson 型钨磷酸盐 alpha-K(7)[H(4)PW(18)O(62)].18H(2)O (PW(18))的亚硝酸盐传感器，该传感器在玻碳电极上的带电荷聚电解质多聚烯丙基胺盐酸盐 (PAH) 的多层中。用 10 层制造的亚硝酸盐传感器具有约 4 nA/microM 亚硝酸盐的灵敏度、快速响应时间（<6s）、低检测限（约 0.1 microM）、对硝酸盐和分子氧等内源性干扰物的高选择性、从 0.1 microM 到至少 20mM 亚硝酸盐的线性范围以及至少 2 个月的稳定性。此外，这种亚硝酸盐传感器可以在 pH 值为 1 到 9 的范围内运行，并且可以通过增加层数以增加响应时间为代价来提高灵敏度。
