Analysis manganese content

Contamination is a problem one always faces in trace analysis. Mercury is ubiquitous in many laboratories, as is fluoride. Lead is present in dust, particularly in laboratories located close to heavy automobile traffic. Extreme caution must always be exercised as contamination on the trace level may come from unexpected sources. Table I shows that using manganese steel in the jaws used to crush the coal increased the manganese content of the crushed coal more than twofold. 

The FAAS procedure described above, is suitable for the majority of food-analysis applications. In some instances, however, low manganese contents will dictate the use of SEFAAS or EAAS techniques [202—205]. An interesting multielement (Cd, Cu, Co, Mn, Ni, Pb and Zn) scheme using chelating ion exchange has been outlined by Baetz and Kenner [206]. 

Trace analysis including previous element concentration procedures as well as partial matrix removal (II.B.2) produces an increase in RSD with an injection volume of only 10 jal of 7.6 relative percent in a copper concentration of 0.0021 weight percent and to 16 relative percent with a manganese content of 0.00088 weight percent. Use of an automatic injector can improve the reproducibility of the sample volume considerably [14]. 

In addition to the previously given specialized urethane characterization parameters, routine analytical analysis criteria are also determined for polyol intermediates these are refractive index, distillation range, flash point, copper and manganese content, being <0002 and <0001, respectively (these indicate oxidative tendencies), and sodium and potassium levels in ppm, being typically 10 ppm maximum (these indicate... 

Analysis of hair and blood samples for manganese content Indicate thst suhclinical deficiencies of the mineral ntight aggravate such disorders as grdtATth impairments, bone abnormalities, diabeticlike carbohydrate metabolism, lack ol muscle coordination of the newborn, and abnormal metabolism of lipids (fatty acids, choline, and cholesleroll. 

An example of a method suitable for the determination of cadmium, cobalt, copper, iron, manganese, nickel, and zinc in water, using chelation and sample extraction, is as follows [113]. The sample is filtered through an acid-washed membrane filter as soon as possible after collection. It is then acidified with nitric acid for preservation until analysis. This will give the soluble metal fraction. If the total metal content is to be found, the sample is acidified and allowed to stand for 4 days with occasional shaking. Then it is filtered. 

Analysis of particles originating from the use of matches revealed that only a very small number of spherical particles were present the majority of particles was very irregular. The elements detected were aluminum, calcium, chlorine, chromium, iron, potassium, magnesium, manganese, phosphorus, sulfur, antimony, silicon, and zinc, with potassium, chlorine, phosphorus, sulfur, and silicon the major components. Antimony was detected in only 2 of the 17 types of matches examined. None of the samples examined would be confused with FDR particles as both their morphology and elemental content differed. 

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