Method for rapid determination of selenium content in tetrastigmatis hemsleyani
A rapid determination and clover technology, applied in the field of physical and chemical testing, can solve the problems of cumbersome wet digestion procedures, long digestion cycle, long measurement cycle, etc., and achieve the effect of shortening the detection cycle, weak interference, and fast detection
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Embodiment 1
[0029] (1) Experimental instrument: the atomic fluorescence spectrometer used in this example is AFS-8220 from Beijing Jitian Instrument Co., Ltd.
[0030] (2) Sample pretreatment: Wash the Clover sample, dry it at 50°C, pulverize it with a sample mill, pass through a 24-mesh sieve, store it in a ziplock bag, and stick a label to obtain the sample to be tested for future use.
[0031] (3) Reagents and preparation:
[0032] Nitric acid (excellent pure);
[0033] Hydrochloric acid (excellent pure);
[0034] Potassium hydroxide (excellent pure);
[0035] Reductant: Potassium borohydride, dissolving an appropriate amount of potassium borohydride in a potassium hydroxide solution with a mass concentration of 5g / L to prepare a potassium borohydride solution with a mass concentration of 8g / L, set to volume, shake well, and set aside;
[0036] Carrier current: hydrochloric acid solution with a volume concentration of 5%
[0037] Single element selenium standard solution: 1000mg / L;...
Embodiment 2
[0050] (1) Experimental instrument: the atomic fluorescence spectrometer used in this example is AFS-8220 from Beijing Jitian Instrument Co., Ltd.
[0051] (2) Sample pretreatment: Wash the Clover sample, dry it at 50°C, pulverize it with a sample mill, pass through a 24-mesh sieve, store it in a ziplock bag, and stick a label to obtain the sample to be tested for future use.
[0052] (3) Reagents and preparation:
[0053] Nitric acid (excellent pure);
[0054] Hydrochloric acid (excellent pure);
[0055] Potassium hydroxide (excellent pure);
[0056] Reductant: Potassium borohydride, dissolving an appropriate amount of potassium borohydride in a potassium hydroxide solution with a mass concentration of 5g / L to prepare a potassium borohydride solution with a mass concentration of 8g / L, set to volume, shake well, and set aside;
[0057] Carrier current: hydrochloric acid solution with a volume concentration of 5%
[0058] Single element selenium standard solution: 1000mg / L;...
Embodiment 3
[0071] (1) Experimental instrument: the atomic fluorescence spectrometer used in this example is AFS-8220 from Beijing Jitian Instrument Co., Ltd.
[0072] (2) Sample pretreatment: Wash the Clover sample, dry it at 55°C, pulverize it with a sample mill, pass through a 24-mesh sieve, store it in a ziplock bag, and stick a label to obtain the sample to be tested for future use.
[0073] (3) Reagents and preparation:
[0074] Nitric acid (excellent pure);
[0075] Hydrochloric acid (excellent pure);
[0076] Potassium hydroxide (excellent pure);
[0077] Reductant: Potassium borohydride, dissolving an appropriate amount of potassium borohydride in a potassium hydroxide solution with a mass concentration of 5g / L to prepare a potassium borohydride solution with a mass concentration of 8g / L, set to volume, shake well, and set aside;
[0078] Carrier current: hydrochloric acid solution with a volume concentration of 5%
[0079] Single element selenium standard solution: 1000mg / L;...
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