Detection method for content of adenosine in biological sample
A technology for biological samples and adenosine content, applied in the field of high-sensitivity adenosine detection, can solve the problems of time-consuming operation and expensive instruments, and achieve the effect of wide linear range and high-sensitivity detection
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[0027] In this embodiment, the detection is the adenosine content in the urine of lung cancer patients, and the steps are as follows:
[0028] (1) Preparation of ferroferric oxide magnetic nanoparticles with carboxyl groups on the surface (P. Sun, H. Y. Zhang, C. Liu, J. Fang, Langmuir 2010, 26(2), 1278–1284.): Co-precipitation method Preparation of magnetic Fe 3 o 4 Nanoparticles: Add 80 mL deoxygenated ultrapure water into a 250 mL three-neck flask, stir magnetically, keep the stirring speed at 800 rpm, add 1.72 g of FeCl under nitrogen protection 2 · 4H 2 O and 4.72 g FeCl 3 · 6H 2 O, when the temperature rises to 80°C, add 10 mL of concentrated ammonia water and 2 mL of PEG dropwise, react for 1 h, wash with deionized water until neutral, and disperse in 100 mL of ethanol to obtain Fe 3 o 4 magnetic nanoparticles. Dissolve 10.5 g of citric acid monohydrate supernatant in 100 mL of water, add finely ground Fe 3 o 40.5 g, ultrasonically dispersed for 20 min, mecha...
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