Electrothermal quartz tube atomizer

Abstract

The invention provides an electrothermal quartz tube atomizer which is combined with an atomic absorption spectrophotometer and a hydride generator to form a hydride generation-atomic absorption spectrophotometric method analysis and measurement system for detecting hydride-forming elements in a laboratory sample. The electrothermal quartz tube atomizer is characterized in that the main body of aseat body is made of a ceramic material, a middle vertical cross section is an H-shaped rectangular trough structure, an upper slot is equipped with an electrothermal quartz tube, the two ends of theslot have holes on an extension line of a quartz tube mouth, and the aperture is about 10 mm. The front side and back sides of the slot are provided with four vent holes respectively, and electrothermal wires of the electrothermal quartz tube are led out of the holes at the front side close to the outside. A lower slot is equipped with two lower reeds such that the lower slot is in a close connection with a flame atomizer. The seat body is covered with a ceramic cover plate with four vent holes, and the cover plate is fastened to the main body of the seat body by the two upper reeds. The electrothermal wires and a power supply wire are connected by terminals which are fixed to the main body of the seat body by screws. In this way, the electrothermal quartz tube atomizer is formed. The electrothermal quartz tube atomizer has the advantages that an electric heating component is installed in the seat body made of the ceramic material, the appearance is simple, the component is safe and reliable, the component is convenient to install and unload on the flame atomizer, and the electrothermal quartz tube is convenient to disassemble and replace.

Description

technical field [0001] The invention relates to an electrothermal quartz tube atomizer, belonging to a detection laboratory instrument component. Background technique [0002] In the analysis and testing laboratory, the trace amount of arsenic, antimony, bismuth, selenium, lead, tin, tellurium and other elements that can form hydrides in the sample can be analyzed and determined by hydride generation-atomic absorption spectrophotometry. The currently commercially available quartz tube atomizers mainly include: ①Flame heating quartz tube atomizer: the quartz tube is directly roasted with a flame. The temperature of the fire is too low to meet the requirements of atomization. ② Electrothermal quartz tube atomizer: The main advantage of this type of device is that the temperature is easy to control; it can be roughly divided into two types: one is that the electric heating wire is wound around a T-shaped quartz tube, and the quartz tube is tied to a metal sheet, separated by a...

AI Technical Summary

Problems solved by technology

The currently commercially available quartz tube atomizers mainly include: ①Flame heating quartz tube atomizer: the quartz tube is directly roasted with a flame. The temperature of fire is too low to meet the requirement of atomization

② Electrothermal quartz tube atomizer: The main advantage of this type of device is that the temperature is easy to control; it can be roughly divided into two types: one is that the electric heating wire is wound around a T-shaped quartz tube, and the quartz tube is tied to a metal sheet, separated by a mica sheet , the metal sheet is inserted into the combustion seam of the flame atomizer, and the heating wire is exposed, which gives people a sense of terror of being easily shocked and has potential safety hazards; the other is to wrap a cylindrical insulating sleeve outside the heating wire, and use two Ω-shaped The metal sheet is tightly clamped, and this device is not tightly connected with the flame atomizer, which is not easy to operate and also has potential safety hazards

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