Method for detection of arsenic content in pyrite or pyrite concentrate by atomic fluorescence spectrophotometry
A technique of atomic fluorescence spectrometry and pyrite, applied in fluorescence/phosphorescence, material excitation analysis, etc., can solve the problems of low accuracy of detection results, complicated operation process, easy loss of arsenic, etc., and achieve fast measurement speed and accurate measurement results , the effect of improving the degree of restoration
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Embodiment 1
[0030] A method for detecting arsenic content in pyrite by atomic fluorescence spectrometry, comprising the following steps:
[0031] Step 1, drying the pyrite sample at 100-105°C to constant weight, pulverizing it with a pulverizer, and passing it through a 150um test sieve;
[0032] Step 2. Take 0.2 g of the sieved sample in a 150 mL container, add 15 mL of hydrochloric acid, and heat to dissolve the sample; then add 5 mL of nitric acid, continue heating and steaming to a wet salt shape, and cool to obtain a wet salt sample;
[0033] Step 3. Add 5mL of hydrochloric acid with a volume ratio of 1:1 to the wet salt sample, dissolve the soluble salts, cool, transfer to a 100mL volumetric flask, add 10ml of thiourea-ascorbic acid mixture, and dilute with water to volume Carry out dry filtration, discard initial 20mL filtrate, pipette 1mL filtrate in 50mL volumetric flask, add water again and dilute constant volume, obtain sample solution; Described thiourea-ascorbic acid mixed so...
Embodiment 2
[0039] A method for detecting arsenic content in pyrite by atomic fluorescence spectrometry, comprising the following steps:
[0040] Step 1, drying the pyrite sample at 100-105°C to constant weight, pulverizing it with a pulverizer, and passing it through a 150um test sieve;
[0041] Step 2. Take 0.2 g of the sieved sample in a 150 mL container, add 15 mL of hydrochloric acid, and heat to dissolve the sample; then add 5 mL of nitric acid, continue heating and steaming to a wet salt shape, and cool to obtain a wet salt sample;
[0042] Step 3: Add 5mL of hydrochloric acid with a volume ratio concentration of 1:1 to the wet salt sample, dissolve the soluble salts, cool, transfer to a 100mL volumetric flask, add 10ml of thiourea solution, and then dilute with water to constant volume; Filter, discard the initial 20mL filtrate, pipette 1mL filtrate into a 50mL volumetric flask, and then dilute with water to obtain a sample solution; the concentration of the thiourea solution is 1...
Embodiment 3
[0048] Pyrite is replaced by sulfur concentrate, and the rest of the parameters and operating process are exactly the same as those in Example 1.
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