Method for detecting tetracycline in food by using specific detection system
A detection method, tetracycline technology, applied in measuring devices, instruments, fluorescence/phosphorescence, etc., can solve the problems of long time, cumbersome pretreatment and detection steps, high detection cost, etc., and achieve good versatility, high sensitivity and specificity detection , high detection accuracy and sensitivity
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Embodiment 1
[0047] The detection of tetracycline content in embodiment 1 milk
[0048] A method for detecting tetracycline in food based on a specific detection system of core-shell type upconversion and magnetic nanomaterials, comprising the following steps:
[0049] Step 1, synthesis of rare earth-doped upconversion core nanomaterials by high-temperature pyrolysis: ReCl 3 ·XH 2 O (1mmol, Y / Gd:Yb:Er=0.48 / 0.3:0.2:0.02) was dissolved in 5mL methanol, and transferred to a 150mL three-necked round-bottomed flask containing 7mL oleic acid and 15mL 1-octadecene, and the solution After heating to 160° C. under an inert atmosphere (Ar) for 30 min with continuous stirring, the solution became clear and it was cooled to room temperature. Next, NH 4 F (4 mmoL) and NaOH (2.5 mmoL) were dissolved in 5 mL methanol and added dropwise to the flask with vigorous stirring, stirred for 40 min, then the solution was heated to 70 °C for 30 min to ensure complete evaporation. Finally, the solution was hea...
Embodiment 2
[0059] The detection of tetracycline content in embodiment 2 pork
[0060] A method for detecting tetracycline in food based on a specific detection system of core-shell type upconversion and magnetic nanomaterials, comprising the following steps:
[0061] Step 1. Synthesis of rare earth-doped upconversion core nanoparticles by high-temperature pyrolysis: ReCl 3 ·XH 2 O (1mmol, Y / Gd:Yb:Er=0.48 / 0.3:0.2:0.02) was dissolved in 5mL methanol, and transferred to a 150mL three-necked round-bottomed flask containing 7mL oleic acid and 15mL 1-octadecene, and the solution was After heating to 160 °C for 30 min with continuous stirring under an inert atmosphere (Ar), the solution became clear and it was cooled to room temperature. Next, NH 4 F (4 mmoL) and NaOH (2.5 mmoL) were dissolved in 10 mL methanol and added dropwise to the flask with vigorous stirring, stirred for 40 min, then the solution was heated to 70 °C for 30 min to ensure complete evaporation. Finally, the solution was...
Embodiment 3
[0067] The detection of tetracycline content in the honey of embodiment 3
[0068] A method for detecting tetracycline in food based on a specific detection system of core-shell type upconversion and magnetic nanomaterials, comprising the following steps:
[0069] Step 1. Synthesis of rare earth-doped upconversion core nanoparticles by high-temperature pyrolysis: ReCl 3 ·XH 2 O (1 mmol, Y / Gd:Yb:Er=0.48 / 0.3:0.2:0.02) was dissolved in 10 mL of methanol and transferred to a 150 mL three-necked round bottom flask containing 3 mL of oleic acid and 7 mL of 1-octadecene, and After the solution was heated to 160° C. under an inert atmosphere (Ar) with continuous stirring for 30 min, the solution became clear and it was cooled to room temperature. Next, NH 4 F (4 mmoL) and NaOH (2.5 mmoL) were dissolved in 10 mL methanol and added dropwise to the flask with vigorous stirring, stirred for 40 min, then the solution was heated to 70 °C for 30 min to ensure complete evaporation. Finall...
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