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Quarternary low pressure gradient mixing device

A low-pressure gradient and mixing device technology, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of high cost and complex structure, achieve high precision, good gradient repeatability, and reduce costs

Inactive Publication Date: 2006-10-11
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

The main drawback of this design is that the structure is complex and the cost is too high

Method used

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  • Quarternary low pressure gradient mixing device
  • Quarternary low pressure gradient mixing device
  • Quarternary low pressure gradient mixing device

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Embodiment Construction

[0024] The invention proposes a low-pressure gradient elution device used in a high-performance liquid chromatograph, which is realized by two parts of hardware and control, and the hardware part can be realized by using the prior art. In conjunction with each accompanying drawing, describe in detail as follows:

[0025] Such as figure 1 shown. The low pressure gradient mixing device of the present embodiment is composed of a microprocessor (MCU), I / O expansion, liquid crystal display circuit, keyboard circuit, memory with clock, programmable timing circuit, electromagnetic valve control circuit, stirring bar control circuit, photoelectric Isolated driving circuit, USB communication module and control module.

[0026] In this embodiment, the microprocessor part is the core of the low-pressure gradient mixing device. It adopts Philips' P89C668 as the CPU of the system. The switching time of the valve and the switching time of the solenoid valve obtained by the algorithm are ...

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Abstract

The invention relates to a quaternary low-pressure gradient mixer, belonging to the biochemical analyzer, which comprises a micro processor, an I / O extender, a liquid crystal display circuit, a keyboard circuit, a memory with clock, a programmable timing circuit, an electromagnetic valve control circuit, a control circuit of mixing rod, a photoelectric isolating circuit; a USB communication interface circuit and a control module. Wherein, it uses the micro processor as core which is connected with the memory, the electromagnetic valve control circuit, the switch power supply, the control circuit of mixing rod, the programmable timing circuit, the I / O extender, the USB communication module; the electromagnetic valve control circuit via the photoelectric isolating circuit controls the electromagnetic valve; the switch power supply controls the power supply switch circuit; the control circuit of mixing rod via the photoelectric isolating circuit control the mixing rod; the P89C668 micro processor via the I / O extender controls the liquid crystal display circuit and the keyboard circuit; and the P89C668 micro processor via the USB communication circuit is connected to the computer. The invention uses elution method to reduce the cost with better application and economic benefits.

Description

technical field [0001] The invention relates to a device in the field of biochemical analysis instruments, in particular to a quaternary low-pressure gradient mixing device used in high-performance liquid chromatography. Background technique [0002] The high-performance liquid chromatograph controlled by a microprocessor now has a high degree of automation. It can not only control the operating parameters of the instrument, but also shrink, enlarge, and superimpose the obtained chromatograms, as well as retain data and peak heights and peaks. It provides high-efficiency and comprehensive analysis tools for chromatographers. The gradient elution system in high performance liquid chromatography is divided into high pressure gradient and low pressure gradient. There are generally two types of high-pressure gradient devices, one is composed of two high-pressure pumps, a gradient program controller, a mixer and other components. This high-pressure gradient device can obtain an...

Claims

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Application Information

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IPC IPC(8): B01D15/18G01N30/34
Inventor 柴新禹王招娣王珺艳赵瑛祝新德
Owner SHANGHAI JIAO TONG UNIV
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