Heavy metal content tester

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Heavy metal content tester

Total reflection X-ray fluorescence works (TXRF)

Principle of X-ray fluorescence spectrometry (XRF): the atomic level by the original X-ray excitation, the issue of secondary X-ray fluorescence. Therefore, XRF analysis can:

According to the fluorescence wavelength and energy, to determine the element;

The concentration of each element can be calculated based on the intensity of fluorescence.


X-rays by a Mo target or W target produced in Ni / C multilayer film reflective artificial and monochromatic. Flat beam with a very small angle (0.3 - 0.6 °) grazing the sample holder containing the sample, and total reflection occurs. Characteristic fluorescence generated by the sample is energy dispersive detector (XFlash® detector) to detect, by coupling the strength of a multichannel analyzer measurement.


The biggest difference conventional XRF, total reflection fluorescence (TXRF) is the use of monochromatic light and the total reflection optical member. In the total reflection beam irradiated samples, reducing the absorption, and the sample and light scattering substrate materials. The result is greatly reduced background noise, and therefore there is a much higher sensitivity and significantly reducing the matrix effect.


Total internal reflection fluorescence (TXRF) The main advantage is that, compared to other atomic spectroscopy methods such as AAS or ICP-OES, no memory effect.


Total reflection fluorescence analysis, the sample can be prepared in a total reflection X-ray sample holder. Therefore, the sample holder diameter 30mm, typically of acrylic material or quartz glass.


Liquid sample directly onto the sample holder, typically using a micropipette transfer pipette a few microliters (μl) of test solution to the sample holder. Then evaporated and dried in an oven or a desiccator.


Solid sample, different sample preparation methods. Powder samples (suspended matter, soil, minerals, metals, pigments, biological samples, etc.) can be placed directly on the sample holder with the sample measured directly. A typical approach is to use a spoon or airlaid transfer several micrograms (μg) of the sample to the sample holder.


Single small sample (particles, slivers, etc.) can also be prepared directly by methods analogous sample.


In addition, the powder sample may be a volatile solvent such as acetone or methanol to prepare a suspension, suspension was pipetted into a sample holder, microwave digestion methods may also be used.

Main features:



Main technical characteristics

Available for solids, powders, liquids, suspensions, filter material, airborne particulates, such as film samples for qualitative and quantitative analysis of a range of elements 13Al-92U, content range ppb to 100%, the detection limit to 2pg.

Require less sample, less than 10 micrograms of suspended solids in liquids and 1-50 microliters of sample powder samples.

Unique portable total reflection fluorescence analyzer, equipment compact, integrated design, without any auxiliary equipment and gas, liquid nitrogen, etc., can get a site analysis.

1 and 25 automatic injector two designs were applied to a fully automatic analysis of small samples and large numbers of samples per day.

XFlash®SDD fourth generation silicon drift detector, using a Peltier cooling technology, no nitrogen, no consumption. Resolution better than 160eV at MnKa 100Kcps.

Due to the total reflection no background fluorescence intensity is directly proportional to the element content. Factories have been calibrated standard curve, users do not need standard quantitative analysis can be carried out.

Applications: water, wastewater, soil pollution elements; food, medicine, forensic, environmental protection, ceramics, cement, building materials, geology; blood, urine, tissue toxic elements.


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You said the gas analyzer is the Raman Raman laser gas analyzer, analyzer using Raman principle actually has many kinds, such as liquid, solid have, since you said that analysis of the gas and then only the Raman laser gas analyzer. The Raman laser gas analyzer has eight kinds of gas can be measured at the same time online at the same time, there are sixteen kinds of online measurement of gas, gas can be measured up to 110. The characteristics of the students, the answer is above has been perfect.As for the students also said the high price of this problem, do not know which gas analyzer mass spectrometer for higher prices, but also not so many industries to buy? What a price of a goods, we buy clothes and sometimes even cash strapped or to buy brands, why, because in fact. Looking down the price more expensive or more cost-effective ah. After all, gas analyzer for the industry, as long as the instrument point out, or that the measurement precision is not enough, resulting in production or product quality is not good, the enterprise is estimated to be less half life.
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Scientific discoveries are often made by the invention of new observation methods. Taking physics Nobel prize winners for example, fifty percent of the work was created by the creation of new instruments or testing methods. Acquisition, conversion, storage, processing and reveal the material motion instrument is essential tool to realize the information, instrumentation equipment level reflects the productivity of a country's development and modernization level to a great extent.
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Suitable to the information industry, measurement and control technology in the field of design in the information acquisition and processing technology, equipment and system manufacturing, technology development and application research, operation management and other aspects of the work, can also include industrial and commercial, financial, customs, public security, quality assurance, technical supervision and the military and scientific research institutes and colleges and universities engaged in information acquisition and processing technology of the corresponding research and development, technology transfer and transformation, technology management and teaching work in each department of national economy.
Q:What instruments are used in building lightning protection testing?
The utility model is suitable for measuring the grounding resistance of various devices and measuring the resistance value of a low resistance conductor, such as power, post and telecommunications, railways, communications, mines, etc., and also can measure soil resistivity and earth voltage. Ground resistance tester should be kept indoors to maintain its ambient temperature 0 to 40 DEG C, relative humidity of not more than 80 percent, and in the air can not contain enough to cause corrosion of harmful substances.
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Q:What kind of electrical, automatic and instrument equipment are needed in the sewage treatment plant?
Electrical equipment: transformer, power distribution cabinet, control box, motor, cable and corresponding accessories;Water pump equipment: water pump, mud pump, booster pump, flushing pump, administration pump, vacuum pump and electric valve etc.;Machinery and equipment: including mixing equipment, sludge discharge equipment, sludge dewatering equipment, drag or hoist mechanical equipment, air compressor and so on;
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General workshop control analysis, selection of analytical pure chemical reagent. Any preparation, experiment, cooling bath, or heating of a drug. Optional industrial products.
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The difference between the two applications,1 zirconium oxideIs mainly used in the measurement of the oxygen content in the furnace, occupy most of this type of application.Advantages: strong adaptability and corrosion resistant detector, dust and water, the technology is mature, the price is cheap, do not need tedious pretreatment, direct measurement, measurement stability.Disadvantages: process the atmospheric pressure near the measurement of gas flow rate is not too high, the application has some limitations. Of course, micro or high-pressure measurement applications also have a very small number.2 paramagnetic oxygen analyzerEffect of from sample gas pressure, through the pretreatment of vacuum dehydration dust and other means of measuring, high precision than zirconia.Is expensive, usually pretreatment maintenance accounts for the main work, also need to have some spare parts support.In heating furnace application, this instrument can also be measured, should be more widely.On accuracy: all manufacturers actually are not a lot of difference, the key is in poor condition, who is the most resistant, who has the best stability. Background gas composition is one of the key factors that affect him, and the type selection needs to be considered.Magnetic pressure analyzer: such as SIEMENS, one of the biggest advantages of the sample gas, and do not contact the sample gas detector, even dirty, within a short period of time there is no effect on the detector, maximum protection

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