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Sample solution pre-treating method and detecting method for determination of active desulfuration effective components
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A desulfurization solution and effective component technology, applied in the direction of measuring devices, material separation, and analysis materials, can solve the problems that cannot truly reflect the concentration of active and effective desulfurization components, and meet the needs of process control detection and analysis. The effect of low reagent cost and improved accuracy
Active Publication Date: 2014-04-23
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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[0005] Therefore, the above two patent applications cannot truly reflect the concentration of active and effective desulfurization components remaining in the desulfurization solution at the flue gas desulfurization production site
Method used
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Embodiment 1
[0033] Pretreatment of sample solution for preparation of desulfurization solution
[0034] Measure 10mL of desulfurization solution into a separatory funnel, add 10mL of ethanol, cover with a stopper, shake to mix and dissolve, use a rotary oscillator for 10 minutes, and then let stand to separate layers. The solution located in the lower layer is separated and removed, and the obtained miscible solution of water and ethanol located in the upper layer is the sample solution prepared by pretreatment. Extract the upper layer solution and detect the concentration of effective active components contained therein by gas chromatography-mass spectrometry (GC-MS) or the like.
[0035] Sample solution of desulfurization solution detected by GC-MS
[0036] The sample solution of the prepared desulfurization solution is used as a detection method by GC-MS, and the desulfurization organic components contained in the sample solution are directly and simultaneously analyzed and determi...
Embodiment 2
[0038] Measure 10mL of desulfurization solution into a separatory funnel, add 50mL of ethanol and cover with a stopper, shake to mix and dissolve, use a rotary oscillator for 15 minutes, and then let stand to separate layers.
[0039] Except for the above, the sample solution for preparing the desulfurization solution was pretreated according to the same method as in Example 1. During GC-MS detection, the dilution factor was equal to 6, and the rest were the same as in Example 1.
Embodiment 3
[0041] Measure 20mL of desulfurization solution into a separatory funnel, add 40mL of ethanol, cover with a stopper, shake to mix and dissolve, use manual shaking to shake the container for 15 minutes, and then stand to separate layers.
[0042] Except for the above, the sample solution for preparing the desulfurization solution was pretreated according to the same method as in Example 1. During GC-MS detection, the dilution factor was equal to 3, and the rest were the same as in Example 1.
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Abstract
The invention provides a sample pre-treating method and a detecting method for determination of active desulfuration effective components in a flue gas desulfurization solution. The pre-treating method comprises the steps of measuring a desulfurization solution, placing the desulfurization solution in a container, adding ethanol in the container to be mixed and dissolved with the measured desulfurization solution, obtaining a mixed solution, still standing the container after shaking the container, separating the mixed solution in the container, and presenting an upper layer solution and a lower layer solution which are not mutually dissolved, wherein the lower layer solution is composed of an organic phase of invalidated desulfurization components which are separated out from the desulfurization solution and free of desulfurization capacity, and the upper layer solution is composed of a mutually soluble mixed solution of water and ethanol of effective desulfurization components with desulfurization capacity so as to detect concentration of the active desulfurization effective components in the desulfurization solution. The sample pre-treating method and the detecting method have the advantages that interfering substances can be eliminated rapidly and completely, damage is not generated for people and environment, operation is simple and easy to master, accurate control, repeat and reappearance are easy to achieve, and the like, and analysis speed is fast.
Description
technical field [0001] The invention relates to the field of detection and analysis of active and effective components in a flue gas desulfurization solution, in particular, the invention relates to an invalid component that loses its original desulfurization activity by using ethanol to form a chelate due to complexation with metal ions A sample solution pretreatment method for separation and removal from the flue gas desulfurization solution, and a method for determining the concentration of active and effective components in the desulfurization solution for the prepared sample solution using gas chromatography-mass spectrometry (GC-MS) and other analysis methods . Background technique [0002] The aqueous solution prepared by dissolving one or more of the organic amine organic reagents in water according to a certain concentration ratio and adding a small amount of activator, antioxidant, etc. can be used as a flue gas desulfurization solution. Good absorption and desorp...
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Application Information
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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/06
Inventor 成勇
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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