Metal Element Analyzer Analysis Features

At present, users of the domestic metallurgy, foundry, and machinery industries are the 1.NKP-8 spectrometers for the analysis of trace elements other than carbon and sulfur in metallic materials. The advantage is that multiple elements can be analyzed at a time with high precision. The disadvantage is that the price is too high, a set of hundreds of thousands to millions, so currently only a few large companies use. 2. Spectrophotometer. The advantage is that the detection wavelength is easy to choose and the price is not high. The disadvantage is that the test result can not be directly displayed (to be converted); there is no curve to establish the call function, the detection of different elements each time to re-calibration; the cuvette is not convenient to put and pour the liquid; the basic knowledge of the operator's chemical analysis requires high Therefore, it cannot meet the needs of on-site on-line inspection and analysis. 3. Colorimetric analyzer. The advantage is that it is easy to use, the price is not high, and the operator's chemical analysis basis is not very demanding. Therefore, it is widely used in the production inspection field analysis. However, because of its historical reasons, there are the following congenital defects.

2. The photoelectric colorimetric metal element analyzer was developed in China in the 1960s to meet the needs of online on-site detection and analysis of five major elements (carbon, sulfur, silicon, manganese, and phosphorus) of iron and steel metallurgy. An elemental analyzer was developed for the detection of silicon, manganese, and phosphorus. (At that time, the elemental analyzer was called, and the three channels were fixed at a fixed wavelength to detect silicon, manganese, and phosphorus, respectively. Since silicon, manganese, and phosphorous do not require much wavelength detection, accuracy is not high. Therefore, the three-element analyzer better satisfies the on-line requirements of the steel and metallurgy industry for on-line analysis of elemental content, but now, all industries need to detect materials other than steel, copper alloys, aluminum alloys, and zinc alloys. From silicon, manganese and phosphorus to copper, chromium, nickel, zinc, magnesium, tungsten, vanadium, tantalum, titanium, molybdenum, aluminum, arsenic, zirconium, boron, rare earth elements, etc. Traditional electro-optical colorimetric metal elements The following deficiencies in the analyzer are becoming more and more serious: 1. The measurement wavelength is preset and cannot be continuously adjusted. Although some models can be replaced (by replacing filters or light-emitting diodes), the user can It is still too cumbersome to use, and it is particularly inconvenient when measuring the types of elements that exceed the number of channels of the instrument or when testing different alloy materials, and not all wavelength filters and LEDs can be purchased. Measurement difficulties certain elements, such as magnesium measurements require a light source of 576nm, the wavelength of such a filter can not be obtained and the LED.

3. The measurement light source is mostly a DC bulb plus a filter or a cold light emitting diode, and its wavelength accuracy is poor. The wavelength accuracy of the DC bulb plus filter method depends on the filter, and most of the filter elements used in the elemental analyzer can only achieve ±15 nm. The wavelength accuracy of light emitting diodes depends on the diodes used. Most of the errors range from 20 to 30 nm, which does not guarantee the accuracy of analysis and detection.