Small-size sequential injection nitride analysis system

A technology of nitrite and sequential injection, which is applied in the direction of color/spectral characteristic measurement, etc., can solve the problems of unsuitable online automatic detection of water quality, difficulty in improving detection accuracy, and poor selectivity of components, etc., and achieves low detection limit and precision High degree and good stability

Active Publication Date: 2013-03-20
YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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Problems solved by technology

However, at present, manual detection is mostly used in spectrophotometry, and the detection accuracy is difficult to improve, and it is not suitable for online automatic detection of water quality.
[0004] Sequential injection analysis (SIA) is the ...

Method used

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  • Small-size sequential injection nitride analysis system
  • Small-size sequential injection nitride analysis system
  • Small-size sequential injection nitride analysis system

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Embodiment Construction

[0030] Such as figure 1 As shown, solenoid valve V1 has ports 1~3, solenoid valve V2 has ports 4~6, solenoid valve V3 has ports 7~9, solenoid valve V4 has ports 10~12, and solenoid valve V5 has ports 13~15. In each solenoid valve, ports 1 and 3 are inlets for standard samples B1 and B2, ports 4 and 6 are for developer R and carrier fluid C, port 12 is for water sample S port, and ports 13 and 15 are waste ports. Interface between liquid bottle W2 and deionized water DW. Port 2 is connected to port 7, port 5 is connected to port 9, port 8 is connected to port 10, port 11 is connected to peristaltic pump P1, and the other port of P1 is connected to port 6 of the six-way valve. Port 6 enters the six-port valve, the connection between ports 2~5 is a quantitative ring, port 1 is connected to the waste bottle, port 3 is connected to the colorimetric cell, port 4 is connected to the peristaltic pump P2, and the other port of P2 is connected to port 14 of the solenoid valve V5 .

[003...

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Abstract

The invention relates to a small-size sequential injection nitride analysis system. A first electromagnetic valve is connected with a nitride standard solution; a second electromagnetic valve is connected with a development agent and deionized water; the first electromagnetic valve and the second electromagnetic valve are both connected to a third electromagnetic valve; the third electromagnetic valve is also connected to a fourth electromagnetic valve connected with a water sample; a fifth electromagnetic valve is connected with the deionized water and a waste liquid bottle with a liquid level detection device; a fourth electromagnetic valve and a fifth electromagnetic valve are respectively connected to a six-way valve through a first peristaltic pump and a second peristaltic pump; the six-way valve is connected with waste liquid, a quantifying ring and a colorimetric match pool respectively. On the basis of theories of an improved sequential injection analysis method and a spectrophotometric method, the system has the advantages of simple structure, simplicity in operation, quantification precision, high stability, high reproducibility, high precision, low detection limit and the like; and in actual application, the system is portable and can perform full-automatic real-time on-line monitoring.

Description

Technical field [0001] The invention relates to an analysis system for nitrite in environmental water samples, in particular to a small sequential injection nitrite analysis system. Background technique [0002] Nitrite is widely found in soil, natural water and food. It can interact with amines and phthalamide compounds in the human body to produce carcinogenic nitrosamine compounds. The potential toxicity caused by nitrite has caused People's great concern, so it is an important indicator of water quality monitoring and food monitoring. [0003] At present, there are many detection methods for nitrous acid content, mainly including spectrophotometry, fluorescence method, ion chromatography, polarography, high performance liquid chromatography, catalytic spectrophotometry, etc. Some of these methods have high sensitivity and good selectivity. However, expensive instruments and reagents have greatly restricted the scope of application; some instruments are large in size and inconv...

Claims

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Application Information

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IPC IPC(8): G01N21/31
Inventor 陈令新吕颖孙西艳付龙文冯巍巍
Owner YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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