Technology of the electrochemical analysis of water environments on traces of heavy metals

The technology is based on an original way "dynamic Culon-meter" not having world analogues. The prototype - the patent the USA №5891322, 1999. For the developed way the priority information of Federal Institute of the Industrial Property from 04.12.2000 is received.

Use of technology allows to create:

• portable express trains - analyzers for the ecological control of water and water sources over field conditions;
• automatic systems of continuous monitoring of water, water sources and atmospheric precipitation;

• inexpensive household analyzers - indicators of drinks and foodstuff;
  biomedical analyzers of blood, lymph and other biological liquids;
  analyzers of pharmaceutical preparations;
• high-sensitivity chips - sensor controls of various application for the analysis of liquids;
• high-sensitivity electrochemical detectors for a liquid chromatography; portable high-sensitivity means of the control of traces of explosives and drugs.

The way is realized in a model sample of the electrochemical analyzer of water on ions of cadmium, lead and copper бSл-2000.

Scopes:

1. The ecological analysis of water and water sources, including in field conditions;
2. The analysis of drinks and foodstuff;
3. The biomedical analysis of blood, lymph and other biological liquids;
4. The analysis of pharmaceutical preparations.

Distinctive features of the analyzer:

1. Use of a single thick-film graphite sensor control;
2. Automatic carrying out of the analysis;
3. Does not demand carrying out of calibrations as provides carrying out non standard measurements;
4. Automatic measurement of the contribution of chemical reactions ("chemical current");
5. The automatic account of the effective area of a working electrode and temperatures of test.

The device and principle of action of the analyzer.

Principle of action.

The original way is put in a basis of work of the analyzer " dynamic Culon-metre" not having world analogues. The prototype - the patent the USA №5891322, 1999. The way allows to realize non standart, absolute measurements Faradey charges of ions in a wide range of concentration. It is achieved by full elimination of influence of currents of the charge - category of a double ionic layer, exact measurement of " a chemical current ", the account of the effective area of a working electrode and temperatures of test. For the developed way the priority information from 04.12.2000 is received

The device.

The developed analyzer is the prototype of the automatic portable electrochemical analyzer. The device represents the microprocessor controller connected to a computer on interface RS-232 (USB) with a galvanic outcome. The analog part ensures the functioning into an electrochemical cell in a mode potentiostate and halvanostate.

Design.

The analyzer is executed as three blocks: actually the analyzer, the block of an electrochemical sensor control with a magnetic mixer, a network power unit. The sensor control represents a three-electrode, single electrochemical cell, with the electrodes executed on thick-film technology. Working and auxiliary electrodes are made of graphite paste, a display electrode - from silver paste.

The software.

Serves for the task of parameters of measurement, storage and display of experimental data in two modes: "Scanner" and "Analyzer". The first mode is used for the "viewing" a range of potential of polarization interesting the researcher, and specification of borders of peaks of metals. The second - it is direct for measurement a Faradey's charge. Sensitivity of the device a mode "Analyzer" is higher the order.

The basic characteristics of analyzer ASK-2000.

Dimensions [mm]:
the analyzer	205*105*40
the touch block	70*50*55
power unit	80*55*50
Weight [g]:
the analyzer	330
the touch block	150
power unit	240
Range of potentials of polarization [V]	±1,28
Range of currents [mkA]	±2560
Volume tests [ml]	0,3
Sensor control	Three-electrode, single cell
Material of a working electrode	Graphite paste
Range of measured concentration [mkg / l, ppb]	from 1 up toП 5*105
Absolute threshold of detection [pg, (10-12g)]	Cd+2 < 2; Pb+2 < 3; Cu+2 < 10
Duration of a cycle of the analysis [mines]	3-5

Authors of technology search for the interested organizations for continuation of development, introductions of technology and the organization of a batch production of analyzers and sensor controls.

The contact information:
Sokolkov Sergey Volodarovich
work phone: 8-(35172)-3-29-71
home phone: 8-(35172)-3-20-24
fax: 8-(35172)-2-43-44
E-mail: sfk@snezhinsk.ru