A portable high-sensitivity detection device for heavy metals based on a microfluidic chip
A microfluidic chip and high-sensitivity technology, applied in the field of heavy metal detection, can solve the problems of short absorption light path and low detection sensitivity, and achieve the effects of high selectivity, small size and convenient operation
Active Publication Date: 2018-04-10
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology
Absorption spectroscopy is widely used in detection and is suitable for the detection of heavy metals. However, due to the short absorption path in microfluidic chips, the detection sensitivity is low.
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[0025] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0026] Such as figure 1 , figure 2 As shown, a portable heavy metal high-sensitivity detection device based on a microfluidic chip, including a sampling unit 1, a Y-shaped microfluidic chip 2, a recovery unit 3, an absorption spectrum detection unit 4, a control and data processing display unit 5 and power supply unit6.
[0027] The sampling unit 1 includes a reagent storage bottle 11 , a blank solution storage bottle 12 , a sample storage bottle 13 , a miniature electromagnetic valve 14 , a first miniature electromagnetic pump 15 and a second miniature electromagnetic pump 16 . The Y-shaped microfluidic chip 2 is fixed on the chip holder 20 by screws, including a first sample inlet 21, a second sample inlet 22, a filter membrane 23, a sample inlet channel 24, a serpentine mixing channel 25, and a sample outlet channel. 26 and sample outlet...
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Abstract
The invention provides a portable high-sensitivity detection device for heavy metals based on a microfluidic chip, which includes a sampling unit, a microfluidic chip, a recovery unit, an absorption spectrum detection unit, and a control and data processing display unit; the sampling unit It includes a reagent storage device, a blank solution storage device, a sample storage device, a miniature electromagnetic valve, a first miniature electromagnetic pump and a second miniature electromagnetic pump; the microfluidic chip includes a first sample inlet, a second sample inlet, a detection channel and sample outlet; the recovery unit includes a waste liquid storage device; the absorption spectrum detection unit includes a light source, an optical resonant cavity and a micro spectrometer; the control and data processing display unit includes a control circuit and terminal equipment. The invention can realize rapid, real-time, in-situ measurement of heavy metals and has high detection sensitivity; the device of the invention has high integration, small volume, light weight, portability and convenient operation.
Description
technical field [0001] The invention relates to the technical field of heavy metal detection, in particular to a portable high-sensitivity heavy metal detection device based on a microfluidic chip. Background technique [0002] In recent years, heavy metal pollution incidents have occurred frequently in my country, such as the cadmium pollution incident in the Shaoguan section of the Beijiang River in Guangdong in 2005, the cadmium pollution incident in the Zhuzhou section of the Xiangjiang River in Hunan in 2006, the cadmium pollution incident in Liuyang, Hunan in 2009, and the cadmium pollution incident in Wugang City, Hunan in 2009. Hundreds of children's blood lead exceeded the standard, dozens of children in Qingyuan City, Guangdong were poisoned with lead, the chromium pollution incident in Qujing, Yunnan in 2011, the cadmium pollution incident in the Longjiang River in Hechi, Guangxi in 2012, etc. Therefore, methods and instruments for fast, real-time, and in-situ dete...
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IPC IPC(8): G01N21/31G01N21/78
Inventor 汪六三王儒敬鲁翠萍汪玉冰宋良图张正勇高钧刘洋
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI