Full-automatic quick measurement system and method for water quality hexavalent chromium

A measurement system and measurement method technology, applied in the measurement of color/spectral characteristics, etc., can solve the problems of low measurement accuracy, complex flow path design, and high failure rate, and achieve the effect of reducing noise interference, reducing failure rate, and timely processing

CN102980860AActive Publication Date: 2013-03-20YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2013-03-20

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Abstract

The invention relates to a full-automatic quick measurement system and method for water quality hexavalent chromium. A first electromagnetic valve is connected with a hexavalent chromium standard solution and a second electromagnetic valve and then is connected to a first joint of a six-way valve through a peristaltic pump; the second electromagnetic valve is connected with a standard sample; a second joint of the six-way valve is connected with a fifth joint through a quantifying ring; a sixth joint of the six-way valve is connected with waste liquid; a third joint of the six-way valve is connected to current carrying liquid through the peristaltic pump; a fourth joint of the six-way valve is connected with one end of a reaction pipe and a development agent passing through the peristaltic pump respectively through a three-way mixing machine; a third electromagnetic valve is connected to the other end of the reaction pipe and air respectively; and the third electromagnetic valve is also connected to the waste liquid through a photoelectric detection device. The full-automatic quick measurement system has the advantages of simple flow path design, pure digital photoelectric detection, bubble interference elimination and the like; and furthermore, a programmable logic controller (PLC) is used, so that the fault rate of an instrument control system is greatly reduced, and an instrument can really carry out unmanned full-automatic measurement.
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Description

technical field

[0001] The invention relates to a measurement system for hexavalent chromium in environmental water samples, in particular to a fully automatic rapid measurement system for hexavalent chromium in water quality and a measurement method thereof. Background technique

[0002] Hexavalent chromium is highly toxic and is easily absorbed and accumulated by the cells of many tissues and organs in the human body. It can interfere with the activity of many important enzymes in the human body and damage the liver and kidneys. It is a recognized carcinogen. Excessive (more than 10ppm) hexavalent chromium has a lethal effect on aquatic organisms. The industrial pollution sources of chromium mainly come from wastewater from ore processing, metal surface treatment, leather tanning, printing, dyeing and printing industries, which has been listed as one of the indicators for total amount control by the environmental protection department. It can be seen that it is necessary ...

Examples

Embodiment Construction

[0037] Such as figure 1 Shown is the connection schematic diagram of the flow collection mode of this system. The automatic measurement system of hexavalent chromium consists of a peristaltic pump, a six-way valve, a solenoid valve, a three-way mixer, a photoelectric detection device, a programmable controller PLC, a touch screen, and a reagent. Bags, PTFE tubing, etc.

[0038] In this system, the sample injection quantitative module is composed of a peristaltic pump P, a six-way valve V4, and a quantitative loop Ls, and the length of the quantitative loop is 45 cm. Port 4 is connected to the three-way mixer X, port 6 is the waste liquid outlet, and port 2 and port 5 are connected to each other to form a quantitative loop Ls. Solenoid valve V1 is provided with ports 1~3, solenoid valve V2 is provided with ports 4~6, and solenoid valve V3 is provided with ports 7~9; port 3 is the inlet of water sample S, port 4 and port 6 are standard samples B2, B1 inlet, port 9 is air A inl...