Method for detecting mercury ion concentration of water sample
A mercury ion and concentration technology, applied in the direction of using material absorption and weighing, can solve the problem of high detection cost
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Embodiment 1
[0052] Embodiment 1, application method of the present invention detects mercury ion concentration (adopting the probe probe-1 of different concentration)
[0053] 1. Adsorption of probe-1 by QCM quartz plate
[0054] 1. Pretreatment of QCM quartz wafers
[0055] QCM quartz slices are washed with newly configured Piranha (by 70 parts by volume 98% H 2 SO 4 aqueous solution and 30 volume parts H 2 o 2 Composition) wash for 2 minutes, then use a resistivity of 18.2M Q cm -1 Wash thoroughly with pure water, then wash with ethanol and acetone in turn, then wash with pure water, and finally blow dry with nitrogen.
[0056] 2. Adsorption of probe-1 by QCM quartz plate
[0057] Add 10 μL solution A (solution A1, solution A2, solution A3 or solution A4) dropwise on the gold electrode on the surface of the pretreated QCM quartz plate, and adsorb at room temperature for 2 hours; wash it with pure water and dry it with nitrogen; add dropwise 50 μL containing 1mM ethanol solution o...
Embodiment 2
[0068] Embodiment 2, application method of the present invention detects the sensitivity of mercury ion concentration (the particle diameter of gold particle is about 12nm)
[0069] 1. Adsorption of probe-1 by QCM quartz plate
[0070] 1. Pretreatment of QCM quartz wafers
[0071] Same as step 1 of embodiment 1.
[0072] 2. Adsorption of probe-1 by QCM quartz plate
[0073] Add 10 μL solution A3 (the concentration of probe-1 is 2 μM) dropwise on the gold electrode on the surface of the pretreated QCM quartz plate, and adsorb at room temperature for 2 hours; wash with pure water and blow dry with nitrogen; add dropwise 50 μL solution containing 1 mM 6 - Ethanol solution of mercapto-1-hexanol, adsorbed at room temperature for 1 h; washed with ethanol and water in sequence, and dried with nitrogen to obtain a QCM quartz plate modified with probe-1.
[0074] 2. Adsorption of gold nanoparticles to probe-3
[0075] 1. Preparation of gold particle sol
[0076] Same as step 2 of em...
Embodiment 3
[0085] Embodiment 3, application method of the present invention detects mercury ion concentration (the particle diameter of gold particle is about 65nm)
[0086] 1. Adsorption of probe-1 by QCM quartz plate
[0087] 1. Pretreatment of QCM quartz wafers
[0088] Same as step 1 of embodiment 1.
[0089] 2. Adsorption of probe-1 by QCM quartz plate
[0090] Same as step 1 of embodiment 2.
[0091] 2. Adsorption of gold nanoparticles to probe-3
[0092] Prepare 30mL of 1% (g / 100mL) chloroauric acid aqueous solution, heat to reflux, quickly add 0.16mL of 1% (g / 100mL) trisodium citrate aqueous solution under stirring, continue heating for 15min and leave to cool to room temperature to obtain gold particle sol . The scanning electron micrograph of the gold particle sol is shown in Image 6 , it can be seen that the particle size of the gold particles in the gold particle sol is about 65nm.
[0093] 2. Adsorption of gold nanoparticles to probe-3
[0094] Same as step 2 of emb...
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