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PS4 microcomputer polarographic dissolution analyzer
Overview: In 1922, Czech scientist Helovski discovered that the current generated by an electrode in a solution containing reducing or oxidizing ions
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Overview
In 1922, Czech scientist Helovski discovered that the current generated by electrodes in solutions containing reducing or oxidizing ions or atomic groups would increase step by step, which was a major discovery in analytical chemistry. Heilowski was awarded the Nobel Prize in Chemistry in 1959 for this. More than 90% of the elements in the periodic table can be analyzed. Constant potential slow scan polarography (* * limit 10-5mol/L), single scan polarography (* * limit 10-7mol/L), pulse polarography (* * limit 10-8mol/L). In 1958, British chemist Bark proposed the pulse polarography method, which applies pulses to the electrode during scanning and uses a time-sharing recording method to detect the interference of charging current, thereby limiting the range of the electrode. Voltammetric analysis adds enrichment process before scanning for * * * limit. In 1976, Swedish chemist Daniel Jagner established potentiometric stripping analysis by recording the relationship curve between electrode potential and time after constant potential enrichment. The pulse enrichment scheme designed in the PS series polarographic dissolution analyzer has the advantage of maintaining the high-speed enrichment of constant potential enrichment and overcoming the interference of intermetallic compounds and hydrogen waves; The background deduction method has made a new breakthrough in the * * limit indicator. The cylindrical glassy carbon electrode overcomes the interference of hydrogen waves. The PS4.0 microcomputer polarographic dissolution analyzer is an electrochemical analytical instrument, which is the * * achievement of the development of polarographic dissolution technology. It consists of four parts: a microcomputer or laptop (Windows * system), a PS4.0 microcomputer polarographic dissolution analyzer host, PS4.0 microcomputer polarographic dissolution analyzer software, and an electrode system.
1 Purpose
1.1 PS4.0 microcomputer polarographic dissolution analyzer is a universal analytical instrument: it is not limited by the industry of use or the type of sample, and is determined by the project to be analyzed, with only differences in sample processing and dilution.
1.2 Measurable substances: Ions and molecules that can gain or lose electrons on the electrode or adsorb on the electrode surface can be measured. More than 90% of the elements in the periodic table can be analyzed. The substances that can be analyzed include saccharin, food coloring, vitamins, etc. The elements that can be analyzed include lead, cadmium, copper, zinc, arsenic, iron, cobalt, nickel, manganese, selenium, platinum, magnesium, aluminum, silicon, vanadium, chromium, gallium, germanium, molybdenum, and more than 60 other metal ions. Ions that cannot be directly analyzed include ammonium ions, sodium ions, potassium ions, sulfate ions, phosphate ions, and fluoride ions.
1.3 Application Department and Testing Projects
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Application Department |
test project |
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CDC Physical and Chemical Analysis Laboratory |
Food analysis, water analysis, cosmetics analysis, biological sample analysis |
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Physical and Chemical Analysis Room of Environmental Monitoring Station |
Food analysis, water analysis, soil analysis, atmospheric analysis |
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supervision and examstation of product quality |
Food analysis, water analysis, cosmetics analysis, biological sample analysis |
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Hospital Trace Element Measurement Department |
Urine lead determination, analysis of trace elements such as iron and zinc in biological samples |
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Maternity and Child Hospital (Station) Laboratory Department |
Urine lead determination, analysis of trace elements such as iron and zinc in biological samples |
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Occupational Disease Prevention and Control Institute |
Analysis of Trace Elements such as Iron and Zinc in Biological Samples, Toxicological Analysis |
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Application Department |
test project |
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**Department |
toxicological analysis |
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Marine monitoring department, quality analysis department |
Trace element analysis |
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Physical and Chemical Analysis Room of Agricultural Research Station |
Trace element analysis, soil analysis |
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University laboratory and Department of Electrochemical Analysis and Research |
Trace element analysis |
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Biopharmaceutical Analysis Department |
Trace element analysis, * * analysis |
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Feed composition analysis |
Trace element analysis |
1.4 Catalytic Wave: Catalytic wave is a polarographic analysis method based on the improvement of the base liquid to enhance the sensitivity and selectivity of polarographic analysis. Metal ions form complexes with certain nitrogen-containing or sulfur-containing compounds, which can generate catalytic waves with high sensitivity and selectivity. The measurement range is 0.00005-1.0 mg/L, with minimal interference from coexisting elements and good selectivity. Both divalent and trivalent ions have catalytic waves. The value of catalytic current increased by catalytic reaction is many times larger than that of pure diffusion current, some even up to 3-4 orders of magnitude, which is of great significance for the analysis of trace substances.
1.5 Polarographic analysis kit: A kit is commonly used in clinical testing, with the advantage of being ready to use and convenient upon opening. Beneficial for improving the quality of inspection data, it is highly welcomed by users. The polarographic analysis kit consists of an instruction manual, a standard spectrum, a standard reagent for identifying concentration values, and a base solution.
2 Characteristics
2.1 Background Deduction: This function increases the limit of dissolution analysis by more than 5 times. Pulse enrichment technology: It maintains the advantages of high-speed enrichment with constant potential enrichment and overcomes the interference of intermetallic compounds and hydrogen waves. Software: The PS4.0 microcomputer polarographic dissolution analyzer software is an application software with Windows * as the window. Automatically perform qualitative and quantitative analysis on the content of the tested substance in the sample.
2.2 Patent technology:
The internal standard normalization method obtains high repeatability of dissolution analysis: this function reduces the RSD * * * 2% of dissolution analysis.
2.3 Patent technology for cylindrical and conical glassy carbon electrodes
Cylindrical glassy carbon electrode design overcomes hydrogen interference and maintains high repeatability. Patent number: ZL.7. Refer to Figure 2.3.
2.4 High sensitivity: dissolution limit<0.01 μ g/L, polarographic limit<10 μ g/L. The sensitivity of measuring lead and many elements is 1000 times higher than flame atomic absorption spectrometry. The PS4.0 microcomputer polarographic dissolution analyzer is complementary to the flame atomic absorption spectrometer in terms of performance and functionality.
Element and * * limit (μ g/L) Element and * * limit (μ g/L) Element and * * limit (μ g/L) Element and * * limit (μ g/L)
Arsenic As: 0.10 Iron Fe: 0.2 Platinum Pt: 0.00001 Vanadium V: 0.5
Bismuth Bi: 0.50 Mercury Hg: 0.1 Rhenium Rh: 0.00001 Tungsten W: 0.2
Cadmium Cd: 0.01 Molybdenum Mo: 0.05 Niobium Sb: 0.5 Zinc Zn: 0.05
Cobalt Co: 0.05 Nickel Ni: 0.05 Titanium Ti: 0.05
Copper Cu: 0.01 Lead Pb: 0.01 Uranium U: 0.025
2.5 High accuracy and good reproducibility: the coefficient of variation of the measurement is less than 2%. Fast analysis speed: Polarographic analysis measures the spectrum every 8 seconds.
2.6 Automation, intelligence, easy to learn and use: The software design of the microcomputer polarographic dissolution analyzer is aesthetically pleasing, with a focus on performance and functionality. Strive to automate and intelligentize the processing of spectral data, and minimize the use of technical terms.
2.7 Extremely low cost of use: The reagents used in polarographic analysis include ammonium salts, sodium salts, potassium salts, hydrochloric acid, sulfuric acid, phosphoric acid, ammonia water, sodium hydroxide, potassium hydroxide, and other commonly used acids, bases, salts, and chelating agents. Most analytical methods can eliminate the extraction and separation steps.
2.8 PS4.0 is also a polarographic analysis method query system: over a hundred sample analysis methods have been provided.
2.9 High salt content without interference: such as seawater.
2.10 Morphological analysis: such as Cr6+/Cr3+, As5+/As3+, Fe3+/Fe2+.
2.11 Analysis of free and complex forms of metals.
2.12 Non metallic and * * substance analysis. Non destructive analysis. Simultaneous analysis of multiple elements.
2.13 The purchase and operation costs are extremely low. Occupying small space.
2.14 Quantitative methods: working curve method window, urine lead analyzer window, standard addition method window, standard document qualitative and quantitative method
2.15 Enrichment methods: pulse enrichment method and constant potential enrichment method.
2.16 Cyclic voltammetry: Spin the triangular wave potential onto the working electrode to determine the reversibility of the electrode reaction.
Click to download the user manual for PS4.0 microcomputer polarographic dissolution analyzer
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