Novel online seawater H2O2 detection instrument as well as preparation method and application thereof

Abstract

The invention relates to an online seawater H2O2 detection instrument and particularly relates to a novel online seawater H2O2 detection instrument and a preparation method and application thereof. The novel online seawater H2O2 detection instrument comprises a reserve power source, a water depth controller, a water surface buoy, a sampler, an electrochemical detection device, a signal output module and an online monitoring module, wherein the reserve power supply is respectively connected with the water depth controller and the electrochemical detection device; the water depth detector is connected with the water surface buoy, and the water depth detector is connected with the sampler; an electrochemical detection probe is mounted in the sampler; the electrochemical detection probe is connected with the electrochemical detection device, the electrochemical detection device is connected with the signal output module, and the signal output module is connected with the online monitoring module. The instrument is advantaged in that the seawater detection method disclosed by the invention belongs to online detection, and the detection equipment can be put in the running process of a marine ship and can also be used for detection on the ship.

Description

technical field [0001] The present invention relates to seawater H 2 o 2 Detection instrument, specifically a new type of online seawater H 2 o 2 Detection instrument and its preparation method and application. Background technique [0002] Existing studies have shown that the upper ocean generally contains hydrogen peroxide (H 2 o 2 ), the concentration can be as high as 10 2 nmol / L. In the slightly alkaline environment of seawater, H 2 o 2 It is both oxidizing and reducing, and has an important impact on the chemical and ecological environment of the ocean. H in seawater 2 o 2 Oxidation-reduction reactions with a variety of trace metals change the forms of these metals in seawater, affect their bioavailability and / or toxicity, and indirectly affect marine ecosystems. The current global environmental problem that has attracted widespread attention—the degradation of coral reefs, H 2 o 2 One of the causes of this problem is the oxidative stress caused by ions a...

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Problems solved by technology

[0004] The H2O2 detection composite electrode prepared by the existing method although partly adopts carbon nanotechnology in the preparation process, for example, in CN109164149A, 8mol / L of H 2 o 2 The response current in the detection reaches about 1.25μA, and the current response is significantly lower, which is equivalent to 20mol / L H 2 o 2 The response current in detection only reaches 3.25μA, and its current response and detection sensitivity are relatively low

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