A valveless liquid-liquid extraction device

Abstract

The invention relates to a valveless liquid-liquid extraction device. The device comprises a glass tube with two ends bent inwards as well as a rotatable fixing clamp for fixing the glass tube on a vibrator, wherein one end of the glass tube is a liquid charging end, the other end is a liquid discharging end with scales, a rubber plug and a rubber sealing cap are also arranged at the liquid charging end and the liquid discharging end respectively, the liquid charging end and the liquid discharging end are bent inwards and form a first bent angle and a second bent angle respectively, and a middle section pipeline for accommodating liquid samples and an organic solvent for extraction are formed between the first bent angle and the second bent angle. Compared with the prior art, the device has the advantages of simple structure, economy and practicability, the design of a valve of a traditional separating funnel is avoided, few liquids remain, smoothness is realized during liquid separation, the device is applicable to a few samples, for which the separating funnel cannot be used, with the dosage as few as one milliliter, the extraction separating efficiency is high, and the accurate volume can be detected during liquid discharge separation.

Description

technical field [0001] The invention belongs to the technical field of chemical instruments, and relates to a liquid-liquid extraction device, in particular to a valveless liquid-liquid extraction device for processing a small amount of samples. Background technique [0002] Sample pretreatment technology (Sample pretreatment technology) refers to the preparation of samples and the use of appropriate decomposition and dissolution methods for samples, as well as the process of extracting, purifying and concentrating the components to be measured, so that the components to be measured can be transformed into measurable forms, so as to carry out Quantitative and qualitative analysis. Due to the interference of the component to be measured by its coexisting components or due to the limitation of the sensitivity of the determination method itself and the requirements of the state of the component to be measured, most chemical detection and analysis methods require effective and r...

AI Technical Summary

Problems solved by technology

However, for the pretreatment of a few milliliters or even a small amount of liquid samples, the current methods or devices have problems such as difficult method development, high price, and poor precision. There are few extraction devices with simple structure, convenient operation, sufficient extraction, and economical efficiency.

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