Method for detecting total mercury in energy saving lamp

A detection method and energy-saving lamp technology, applied in the field of chemistry, can solve problems such as human injury, inaccurate detection results, and difficulty in knowing the source of mercury, and achieve the effects of ensuring reliability, simplifying the analysis process, and eliminating calculation steps.

Inactive Publication Date: 2012-10-17
普旭力
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Problems solved by technology

[0006] None of the above methods can completely solve the volatilization of gaseous mercury, which will lead to inaccurate detection results. At the same time, gaseous mercury vapor may cause harm to the human body. At the same time, the detection process of amalgam lamps is cumbersome. Liquid mercury lamps or amalgam lamps, but it is often difficult to know which type of mercury source is added to a new lamp
[0007] Therefore, the current total mercury detection method for energy-saving lamps still needs to be improved

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0036] Embodiment 1: the detection of total mercury in the lamp tube:

[0037] 1） Preparation of BrCl solution: In a fume hood, dissolve 27 grams of KBr in 2.5 liters of HCl in a large beaker, stir for about 1 hour under a magnetic stirrer, then slowly add 38 grams of KBrO3 while stirring, when all KBrO3 is added Afterwards, continue to stir until all particles are completely dissolved, and tighten the bottle cap. The prepared solution should be dark yellow. If the solution is colorless or very light, it means that BrCl has undergone reduction reaction and must be re-prepared;

[0038] 2） Add 700 mL of deionized, 50 mL of concentrated nitric acid, and 250 mL of BrCl solution into a 2 L polypropylene plastic bottle, mix well and put 5 ceramic pellets with a diameter of about 20-30 mm into the bottle;

[0039] 3） Take an energy-saving lamp to be analyzed, carefully remove the lamp holder and electronic components of the energy-saving lamp with a file or pliers, put it into...

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Abstract

The invention relates to a method for detecting total mercury in an energy saving lamp, comprising the following steps of: preparing a digestion solution containing BrCl and nitric acid; adding the digestion solution into a plastic bottle, uniformly mixing, and putting a plurality of ceramic or glass beads with a certain diameter into the bottle; putting an energy saving lamp, the lamp holder and electronic components of which are removed, into the plastic bottle filled with the digestion solution, and tightening the bottle cap up; shaking the plastic bottle and breaking the lamp; allowing the mercury to be completely absorbed; detecting the mercury content after constant volume, and converting into the total amount of mercury in the lamp. The method is to break and digest the whole lamp in the sealed plastic bottle so as to prevent the leakage of mercury steam, and simultaneously is suitable for amalgam lamps and liquid mercury lamps. In addition, the analysis flow is simplified, and the digestion solution volume, and the sample volume and the constant volume are accurately controlled during the experimental process. Therefore, the concentration value of mercury in the solution measured by the device equals to the content of the total mercury in the lamp, and a tedious calculation step is avoided.

Description

technical field [0001] The invention relates to the field of chemistry, in particular to a method for detecting mercury, and more specifically to a method for detecting total mercury in energy-saving lamp tubes. Background technique [0002] Mercury is an indispensable and important luminescent material in energy-saving lamps. At present, some mercury in energy-saving lamp tubes is added in the form of liquid mercury, and some are added in the form of amalgam. After the lamp tube has been exhausted, aged, and energized, its shape will be very complex, coexisting in solid, liquid, and gaseous states, and it is very easy to volatilize, which brings great difficulties to the determination. Therefore, the most important method for the detection of mercury in energy-saving lamps The problem is the sample preparation, ie the complete capture of the mercury. [0003] HJ / T 230-2006 "Environmental Labeling Product Technical Requirements for Energy-saving Lamps" Appendix A Mercury c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31G01N1/28
Inventor 普旭力王鸿辉王伟潘忠厚
Owner 普旭力
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