Recently, by Associate Researcher Song Chao from the Freshwater Fisheries Research Center of the Chinese Academy of Fishery Sciences”Nano materials and their applications” was authorized by the national invention patent, patent number:ZL201911126021.7.
Mercury is a toxic heavy metal that exists widely in the environment. In fishery waters, microorganisms in the water convert inorganic mercury into methyl mercury, which will accumulate in fish and increase along the food chain. It can be seen that the presence of mercury in fishery water bodies will affect the quality of aquatic products through bioconcentration and bioconcentration effects, and then affect the safety of human dietary consumption. Therefore, it is extremely important to quantify mercury ions in fishery water bodies to make predictions about fishery water quality.
At present, the main methods for mercury ion detection are atomic fluorescence spectrometry, cold atomic absorption spectrometry and dithizone colorimetry. Although these methods can accurately detect the content of mercury ions in fishery waters, their shortcomings are also very obvious, such as the need for relevant large-scale instruments, cumbersome detection steps, and toxic and harmful detection reagents. The rapid detection method can effectively avoid these shortcomings, making the detection of mercury ions more convenient, accurate and faster.
There are few reports on rapid detection methods for mercury ions in fishery waters. The development of fast detection kits for mercury ions in fishery waters with good performance has become the current field of fishery environmental protection in my country The top priority. Similar to the development of general rapid test kits, false positive test results are a common problem in rapid test. Therefore, when developing a rapid detection method for mercury ions in fishery waters, the first step is to find a way to specifically identify and extract mercury ions from fishery waters, and fundamentally solve the problem of mercury ions in subsequent rapid detections. There is a problem of false positive results. The present invention prepares a superparamagnetic magnetic nanomaterial with a stable covalent bond with 30 thymine chain lengths. The carboxyl groups on the surface form an amino-activated ester, which can bind mercury ions, thereby effectively removing mercury ions from the These heavy metals are separated from the aqueous solution, which provides a key technical basis for the subsequent rapid detection technology research and development.