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Novel fluorescence sample cell used for measuring concentration auxiliary parameter fluorescence spectrum and method for gradually diluting sample

An auxiliary parameter and fluorescence spectrum technology, which is applied in the field of fluorescence sample pool and the gradual dilution of the concentration of the sample to be measured, can solve the problems of inaccurate concentration, increased risk of harmful reagents, and reduced precision.

Active Publication Date: 2014-02-26
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] This method is cumbersome and time-consuming, and the consumption of reagents is relatively large. At the same time, during the dilution process of the solution, the sample cell needs to be taken out of the spectrophotometer, which may lead to changes in the measured fluorescence characteristics, resulting in reduced accuracy.
[0010] For volatile reagents or samples to be tested, this dilution process will also cause a large amount of reagents to volatilize, resulting in inaccurate concentrations. If it is a toxic reagent, it will increase the risk of experimenters inhaling or removing harmful reagents, and at the same time cause environmental pollution

Method used

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  • Novel fluorescence sample cell used for measuring concentration auxiliary parameter fluorescence spectrum and method for gradually diluting sample
  • Novel fluorescence sample cell used for measuring concentration auxiliary parameter fluorescence spectrum and method for gradually diluting sample
  • Novel fluorescence sample cell used for measuring concentration auxiliary parameter fluorescence spectrum and method for gradually diluting sample

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Effect test

Embodiment 1

[0021] figure 1 It is a structural diagram for the peristaltic pump of the present invention to realize the automatic dilution of the solution. (1. Reagent bottle cap, 2. Reagent bottle, 3. Peristaltic pump inlet tube, 4. Peristaltic pump, 5. Sample pool inlet tube, 6. Sample pool cover, 7. Sample pool, 8. Drain tube, 9. Drain solenoid valve, 10. Waste liquid bottle cap, 11. Waste liquid bottle.)

[0022] The reagent bottle cap 1 is provided with a vent hole, the lower part of the reagent bottle 2 is connected with a peristaltic pump liquid inlet pipe 3, and the end of the liquid inlet pipe is connected to a peristaltic pump 4, and the peristaltic pump can control the amount of solvent entering the sample pool liquid inlet pipe 5 each time, and the sample pool There is a vent hole on the cover, and the drain pipe 8 passes through the wall of the sample cell, and is connected with a drain solenoid valve 9 to lead to the waste liquid bottle 11. A waste liquid bottle cap 10 with...

Embodiment 2

[0027] The reagent bottle cap 1 is provided with an air hole, the lower part of the reagent bottle 2 is connected with a liquid inlet pipe 4, the middle part of the liquid inlet pipe is connected with a liquid inlet solenoid valve 3, the end of the liquid inlet pipe is connected with a float needle valve assembly 5, and the float needle valve assembly is fixed on the sample. On the pool 7 or the sample pool cover 6, there is a vent hole on the sample pool cover, and the drain pipe 8 passes through the sample pool wall, and is connected with a liquid discharge solenoid valve 9 to the waste liquid bottle 11, and a belt is connected to the waste liquid bottle. The waste liquid bottle cap 10 of the air hole, the beginning of the liquid discharge pipe is slightly bent towards the bottom of the sample cell after entering the sample cell, so as to ensure that when the liquid discharge solenoid valve is closed and the liquid enters the liquid, the liquid will not enter the pipe due to t...

Embodiment 3

[0033] The difference between embodiment three and embodiment two is that the end of the liquid inlet pipe extends into the sample cell through the sample cell cover, and there is no float needle valve assembly for controlling the upper liquid level, but two are added to detect the upper liquid level. The probe of the liquid level position, the probe is connected to the detection circuit and then sent to the control circuit. And the detection circuit can be turned off or connected to the power supply according to the needs, so that the probe is not charged, so as to avoid electrolytic solution.

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Abstract

The invention relates to a sample cell used for a fluorescence spectrometer, particularly to a novel fluorescence sample cell used for measuring a concentration auxiliary parameter fluorescence spectrum. Under a condition that the sample cell is not taken out, a certain volume of sample solution to be measured is taken out from one end of the sample cell, a certain volume of extraction reagent liquid is injected from the other end of the sample cell, therefore, the concentration of the sample solution to be measured in the sample cell is gradually diluted according to the requirement, the volume of the sample solution to be measured and the volume of the injected extraction reagent liquid are constant, the constant volume can be realized by a peristaltic pump in a liquid flow control way and can also be realized by a float needle valve, a liquid level sensor, an air pressure control method, an ultrasonic distance measuring method and the like in a way of controlling the heights of an upper liquid level and a lower liquid level.

Description

Technical field: [0001] The invention relates to a fluorescent sample pool suitable for concentration auxiliary parameter fluorescence spectrum measurement and a method for gradually diluting the measured sample concentration. Background technique: [0002] Polycyclic aromatic hydrocarbons (PAHs) often exist in crude oil, shale, coal, asphalt and other carbonaceous materials, creosote, tar, dyes, plastics, rubber, lubricating oil, antirust oil, release agent, gasoline anticoagulant, Capacitor electrolyte, mineral oil, asphalt and other petrochemical products, also exist in pesticides, charcoal, fungicides, mosquito coils and other daily chemical products. Polycyclic aromatic hydrocarbons (PAHs) are persistent organic pollutants (POPs), which have the characteristics of high toxicity, carcinogenicity, mutagenicity, persistence, long-distance migration and high bioaccumulation. Many countries have identified 16 kinds of PAHs It is an environmental hormone pollutant and a carc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/01G01N21/64
Inventor 王春艳张金亮任伟伟李文东史晓凤何卫东唐明明
Owner BEIJING NORMAL UNIVERSITY
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