Method for detecting GST by combining magnetic single-drop microextraction fluorescent switch with PDAcoating vesicle
A fluorescent switch, single drop technology, applied in the field of bioanalytical chemistry, to achieve the effect of broad application prospects and satisfactory recovery rate
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Embodiment 1
[0044] A magnetic single-drop micro-extraction fluorescent switch combined with a method for detecting GST by PDA-coated vesicles, the method comprising the following steps:
[0045] (1) Fe 3 o 4 Preparation of:
[0046] Weigh 0.82g FeCl 3 ·6H 2 O, dissolve in 40mL ethylene glycol, stir until the solution is clear and yellow and transparent, then add 3.6g NaAC, stir vigorously for 30min, ultrasonicate for 10min, then pour the solution into a polytetrafluoroethylene reactor, 200 ℃ reaction 12h. After taking it out, cool to room temperature, wash with ethanol 4 times, and dry at 60°C;
[0047] (2) Fe 3 o 4 Preparation of @PDA @Aptamer @GST:
[0048] 0.025g Fe 3 o 4 Add 100mL Tris-HCl buffer solution and sonicate for 3 hours, then add 0.1g dopamine hydrochloride, keep away from light and mix mechanically for 6 hours (wrap the beaker with tin foil), and the prepared Fe 3 o 4 Wash the @PDA solution three times with water, then add 20 μL of 1 μM Aptamer, incubate at 30°C...
Embodiment 2
[0057] The method described in Example 1 was used to detect GST in urine: in order to detect the content of GST in urine, the GST in the urine sample was spiked. Using the experimental data of fluorescence measurement, the content of GST in urine is obtained. As shown in Table 1, good recoveries (100.0%-114.2%) were obtained.
[0058] Table 1 Determination of GST Spiked in Urine Samples
[0059]
[0060] a Relative recovery = (total concentration - blank concentration) / spiked concentration
Embodiment 3
[0062] The method described in Example 1 was used to detect the GST content in the blood, and the GST in the blood sample was spiked. Using the experimental data of fluorescence measurement, the content of GST in the blood is obtained. As shown in Table 2, good recoveries (95.8-104.0%) were obtained.
[0063] Table 2 Determination of GST incorporated in blood samples
[0064]
[0065] a Relative recovery = (total concentration - blank concentration) / spiked concentration
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