Cleaning method for simultaneously dredging gas path branch pipe and liquid path branch pipe of ICP atomizer

Abstract

The invention discloses a cleaning method for simultaneously dredging a gas path branch pipe and a liquid path branch pipe of an ICP atomizer. The cleaning method utilizes common low-price common accessories in a laboratory to clean the ICP atomizer and is extremely low in cleaning cost. The ICP atomizer is protected by a pipette head of a pipette and then is placed in a measuring cylinder containing a proper solvent to be directly subjected to ultrasonic cleaning, then an injector is connected with the pipette head to rapidly and simultaneously flush the gas path branch pipe and the liquid path branch pipe of the ICP atomizer, the ultrasonic solvent can be low-concentration acid or even deionized water instead of acid, the hazard risk is greatly reduced, the cleaning time is shortened, the cleaning effect is improved, and the smoothness of the ICP atomizer is ensured; and meanwhile, the operation process is simple, convenient and rapid, and the method is more suitable for various types of ICP atomizers. After the cleaned ICP atomizer is installed on an instrument again, it can be found that both the atomization gas flow speed and the atomization pressure can reach normal values, the atomization effect is good, and a good foundation is provided for accurate testing of the instrument.

Description

technical field [0001] The invention relates to a cleaning method for an ICP atomizer, in particular to a cleaning method for simultaneously dredging the gas path branch pipe and the liquid path branch pipe of the ICP atomizer. Background technique [0002] ICP nebulizer is a key accessory of inductively coupled plasma optical emission spectrometer (ICP-OES) or inductively coupled plasma mass spectrometer (ICP-MS). According to the material, ICP nebulizers can be divided into quartz nebulizers or glass nebulizers that are not resistant to hydrofluoric acid, and polymer material nebulizers such as polytetrafluoroethylene that are resistant to hydrofluoric acid. In order to ensure the signal strength of the instrument, it is necessary to keep the ICP nebulizer unobstructed and have a good atomization effect. The clogging of ICP atomizers is one of the common problems, and because it is expensive to replace, it needs to be cleaned with extra care. [0003] When it is found th...

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Problems solved by technology

But for silicon particles, low concentration hydrofluoric acid can be used to clean, but it is necessary to prevent hydrofluoric acid from corroding the quartz atomizer, and hydrofluoric acid is toxic and highly corrosive

2. Sample deposition in the capillary: due to the long-term failure to clean the ICP nebulizer, the sample is deposited and blocked in the capillary

4. Stubborn and insoluble substances block the capillary: use very thin copper wire or hair to pass into the ICP nebulizer, carefully dredge the capillary, but it is very likely to cause damage to the ICP nebulizer

It can be seen that the traditional ICP atomizer cleaning method needs to use various strong and toxic acids, and soaking takes a long time, and even the ICP atomizer will be damaged when knocking and dredging

[0004] However, although the existing patents respectively propose the liquid path cleaning method and the gas path cleaning method of the ICP atomizer, they cannot clean the liquid path and the gas path of the ICP atomizer at the same time, that is, only one path can be cleaned each time, which is time-consuming and cumbersome. And all involve high-concentration strong acid and corrosive acid, which has certain dangers for operation

In some methods, the ICP nebulizer needs to be reversed to the instrument for operation, which is cumbersome to operate, and there is no reversed connection port on the instrument, so it must be purchased separately, or even reversed. In addition to the cost increase, forced reverse connection is also likely to cause equipment failure

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