Micro wave colorimetric pool

Abstract

The invention discloses a micro wave colorimetric pool, which comprises a pool body, a microwave radiator and a temperature sensor, wherein the pool body is a light-transmission hollow container; a threaded opening, a top cover and a sealed pad are arranged at the upper side; the microwave radiator comprises a fine rod body and a radiation head; the temperature sensor comprises an optical fiber connecting body and a temperature sensing probe. The micro wave colorimetric pool is characterized in that the fine rod body and the optical fiber connecting body are fixed in the sealed pad of the poolbody ; the radiation head and the temperature sensing probe extend to the upper part of the colorimetric pool body; the radiation head has a forwards extending microwave heat field region. In the useprocess, the microwave colorimetric pool is arranged on a colorimetric base of an externally mounted optical fiber spectrum system; a spectrum emitting probe and a receiving probe directly face the micro wave heat field region in the pool body. A microwave reactor and the colorimetric pool are integrated; the device and the operation process are simplified; the sample treatment speed is obviouslyaccelerated; the temperature control is precise; the spectrum measurement in the microwave field can be realized.

Description

technical field [0001] The invention belongs to the field of analytical instruments and equipment, and relates to a spectrum measurement equipment integrated with sample processing, in particular to a microwave cuvette. technical background [0002] Microwaves are electromagnetic waves with a frequency of 3×102 to 3×105 MHz. Microwave heating is to directly heat substances through the two effects of molecular polarization and ion conduction. It is used in microwave condensed state chemical reactions, microwave-induced catalytic reactions, microwave inorganic synthetic chemistry, microwave organic synthetic Plasma synthetic chemistry, microwave plasma analytical chemistry and other fields have been widely used. At present, the application of microwave technology in analytical chemistry is mainly limited to microwave sample preparation technology, such as microwave digestion, microwave extraction, microwave hydrolysis, microwave headspace and other rapid sample preparation te...

AI Technical Summary

Problems solved by technology

Multi-mode microwave technology uses the reflection of microwaves inside the resonant cavity to form a variety of working "modes" in the resonant cavity. The advantage is that the cavity is large, and it can perform relatively batch, high-temperature and high-pressure reactions under relatively high-power microwave conditions. Existing microwave chemical devices mostly use high-voltage excitation magnetron microwave generators. In addition, the multi-mode microwave resonator needs to ensure a certain cavity volume. Microwave energy is fed through the waveguide. Not only is the volume large, but the microwave energy is distributed throughout the cavity. In the middle, the energy density in the reactor is low, the microwave power and frequency distribution are unstable and inhomogeneous, the sample temperature is difficult to control, and the temperature of the aqueous solution sample rises rapidly, resulting in the destruction of heat-sensitive components; microwave treatment, color reaction and colorimetric process The sample needs to be transferred and constant volume multiple times, the operation is cumbersome, and the uncertainty of the measurement is increased. It is not suitable for precise processing of trace or small amount of samples.

[0004] In addition, some analysis processes, such as blood analysis, need to be carried out in a constant temperature environment, which requires the cuvette to have constant temperature characteristics. The existing constant temperature device mainly heats the cuvette from the bottom or both sides of the cuvette. The internal temperature is not easy to be uniform, and it is difficult to control the temperature. If microwave heating can be used, the heating can be made more uniform and the temperature can rise faster. However, it is impossible to place the colorimetric cell of the spectrophotometer in the existing microwave cavity, and microwave radiation may affect the Therefore, it is difficult for existing devices to realize microwave heating in the colorimetric process.

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