An integrated sensor for rapid detection of complex seawater nitrite in-situ self-separation
By designing a portable electrochemical sensor for vertical flow nitrite detection based on a self-separating membrane and employing a screen-printed electrode modified with ZnS/VMSF-TMAC, the problems of cumbersome operation and susceptibility to interference in existing nitrite detection technologies have been solved. This enables accurate, rapid, and in-situ detection of nitrite in marine aquaculture environments, with excellent selectivity and stability.
CN122409798APending Publication Date: 2026-07-17SUN YAT SEN UNIV
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SUN YAT SEN UNIV
- Filing Date
- 2026-04-28
- Publication Date
- 2026-07-17
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Figure CN122409798A_ABST
Abstract
This invention belongs to the field of electrochemical sensor technology for water quality analysis, specifically relating to an integrated sensor for rapid on-site self-separation detection of nitrite in complex seawater. It includes a self-separating membrane, a membrane slot, a screen-printed electrode, and an electrode slot. Two self-separating membranes fixed in the membrane slots and the screen-printed electrode fixed in the electrode slots are connected sequentially in a vertical direction, which is the sample flow direction. The screen-printed electrode is modified with ZnS / VMSF-TMAC material to form a sensing interface with anion-selective permeability. A filtrate storage cavity is formed between the self-separating membrane and the screen-printed electrode to store the filtrate to be tested after filtration through the self-separating membrane. This sensor, when used in complex seawater environments, has a detection range of 0.005-5 mM and retains 85% of the signal after 28 days of storage.
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