A water polycyclic aromatic hydrocarbon detection reagent and its application
A technology for polycyclic aromatic hydrocarbons and detection reagents, which is applied in the field of detection reagents for polycyclic aromatic hydrocarbons in water, can solve the problems of difficulty in stably dispersing aqueous solutions, limited application, increased hydrophobicity, etc., and achieves improved enrichment capacity, high sensitivity, and ultra-sensitive detection. Effect
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Embodiment 1
[0038] (1) Measure 20ml10 -2 M AgNO 3 Solution, 59ml of deionized water, 1ml of graphene oxide solution, mixed and ultrasonicated for 15min at room temperature, transferred to a three-necked flask;
[0039] (2) Heat the above solution to 90°C while stirring, quickly add 20ml of 1% trisodium citrate solution, and continue the reaction for 24h;
[0040] (3) Washing and separating the above-mentioned reactants after naturally cooling to room temperature, and obtaining a graphene / nano-Ag composite with excellent surface-enhanced Raman effect;
[0041] (4) Graphene / nano-Ag composite that step (3) is made is redispersed in water, and concentration is 0.01M (in terms of silver content), obtains reagent A;
[0042] (5) The aqueous solution of pyrene is mixed with the concentration of 2 mg / ml reagent B (CTAB), wherein the concentration of pyrene after mixing is 10 -4 M, the concentration of CTAB is 0.2 mg / ml, then add 100 μL of reagent A, mix and sonicate for 30 minutes. During tes...
Embodiment 2
[0044] (1) Measure 20ml10 -2 M AgNO 3 Solution, 59ml of deionized water, 0.5ml of graphene oxide solution, mixed and ultrasonic at room temperature for 15min, transferred to a three-necked flask;
[0045] Step (2)-(4) is identical with embodiment (1);
[0046] (5) The aqueous solution of perylene is mixed with reagent B (TTAC) whose concentration is 2 mg / ml, wherein the concentration of perylene after mixing is 10 -6 M, the concentration of TTAC is 0.4 mg / ml, then add 100 μL of reagent A, mix and sonicate for 30 minutes. During test sample preparation, draw 10 μL of the above solution and drop it on a cleaned glass slide for Raman detection (excitation wavelength is 532nm), as shown in image 3 As shown, obvious characteristic peaks of perylene can be observed.
Embodiment 3
[0048] (1) Measure 20ml10 -2 MHAuCl 4 Solution, 59ml of deionized water, 1ml of graphene oxide solution, mixed and ultrasonicated for 15min at room temperature, transferred to a three-necked flask;
[0049] (2) Heat the above solution to 100°C while stirring, quickly add 20ml of 1% glucose solution, and continue the reaction for 24h;
[0050] Step (3)-(5) is identical with embodiment (1), as Figure 4 As shown, obvious characteristic peaks of pyrene can be observed.
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