Optical flow control detector for determining phosphorus content in seawater based on mobile phone APP

Abstract

The invention provides an optical flow control detector for determining the phosphorus content in seawater based on a mobile phone APP. The optical flow control detector comprises a first micro-flow pump for pumping liquid to be detected and a second micro-flow pump for pumping an indicator, wherein a reaction part is a microfluidic network and is of a tree-shaped network structure; the reaction part is a multi-layer mixing unit; a detection unit comprises a light source, a microfluidic chip and a photosensitive element which are arranged from top to bottom, and a sandwich structure is formed;the microfluidic chip is provided with a colorimetric unit; the lowest mixing unit communicates with the colorimetric unit in a one-to-one manner; a signal transmission part converts a light signal obtained by the detection part into an electric signal and is connected to the mobile phone APP through Bluetooth; the mobile phone APP obtains a detection result through calculation; and a waste liquid collecting part communicates with an outlet of the colorimetric unit for collecting the discharged waste liquid. The optical flow control detector for determining the phosphorus content in the seawater based on the mobile phone APP is small, efficient and portable, and the content of phosphate can be stably determined.

Description

technical field [0001] The invention specifically relates to an optofluidic detector for determining phosphorus content in seawater based on a mobile phone APP. Background technique [0002] Seawater monitoring is an important part of environmental monitoring. Phosphate, as a typical seawater nutrient, plays a vital role in the growth of plankton in the ocean. Seawater nutrient monitoring is of great significance in understanding the material cycle in the environment and preventing the proliferation of harmful algal blooms in the ocean. Colorimetry, based on the Beer-Lambert law, is the main method for determining the concentration of phosphate in aqueous solutions, which shows that the absorbance of a substance is linearly related to its concentration. Phosphate ion itself has almost no absorption in the visible light range, so an indicator needs to be used for color reaction before detection. First, several standard concentrations of phosphate solutions were prepared, a...

AI Technical Summary

Problems solved by technology

In addition to facing the same problems as traditional methods, optical signals are more easily affected by disturbances in the microfluidic chip when they are transmitted in micron-scale absorption cells, which puts forward higher requirements for the stability of the detection system

[0004] Traditional optofluidic detection instruments based on colorimetry require a computer as a data analysis module, which is inconvenient for real-time monitoring

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