In recent years , there have been many reports of high sensitivity for the determination of new chromogenic reagents for manganese. However, because the selectivity is not yet ideal, there are few examples of applications in daily analysis. Although the sensitivity of permanganate method is not high, but the selectivity is good, so the conditions for increasing the amount of sample can also be measured with low levels of manganese. For example, take 1g sample, using KIO4 oxidation method can be directly measured in pure aluminum as low as w ( Mn ) = 0.002% of manganese, the same conditions can also be applied to the determination of low manganese content in pure magnesium . For the determination of lower levels of manganese [w ( Mn ) = 0.002%] , the appropriate separation method must be used. As in slightly alkaline or ammonia to ammonium citrate solution as a masking agent, DDTC added, and precipitated dn DDTC-Mn and Mn (â…¢) tg, then the solution was extracted with CHCl3, CCl4 and the like separated. Traces of manganese can be separated from pure aluminum, pure vanadium, etc.; after decomposing organic matter, permanganate spectrophotometry can be used to determine .
HX type metal material with elemental analyzer metallic material such as carbon steel test, high low-alloy steel, stainless steel, raw iron, gray iron, ductile iron, cast iron, alloy cast iron, steel and other materials of C, S, Mn The content of elements such as P , Si , Cr , Ni , Mo , Cu , Ti , V , Al , W , Nb , Mg , and rare earth elements was examined. Samples were burned in an electric arc furnace, measured by gas volumetric method C , automatically titrated to measure S by iodometric method, and other elements were determined by photoelectric colorimetric analysis.
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