Continuous Analysis Of6Kinds Elements: Cu, Zn, Co, Ni, Cr, Mn In Stream Sediment Samples By Flame Atomic Absorption Spectrometry

In a new round of geological surveys, chromium, cobalt, nickel, copper, zinc andmanganese are common elements of needs analysis, each element has a number ofdifferent analytical methods, but a decomposition of the sample and at the same time,the only way to determine the six elements inductively coupled plasma emissionspectrometry (ICP-AES) and inductively coupled plasma mass spectrometry (ICP-MS),but the high cost of the two kinds of instruments and the operation cost is high, thebasic is not equipped with laboratory team level. In this paper, with a mixed aciddecomposition of samples, flame atomic absorption spectrometry (FAAS) in streamsediment samples copper, zinc, cobalt, nickel, chromium, manganese element six clockfor continuous measurement, satisfactory results were obtained.The correlation coefficient of standard curve of R of copper, zinc, cobalt, nickel,chromium, manganese is above0.999, the detection limit was0.033μg/mL,0.041μg/mL,0.066μg/mL,0.015μg/mL,0.034μg/mL,0.15μg/mL, under the circumstancesof the best soluble minerals and equipments, twelve sets of precise and accurateexperiments are made on the GBW07301～of GBW07314eight standard material, themaximum standard deviation for copper, zinc, cobalt, nickel, chromium and manganesewere:8.09%,8.09%,9.93%,9.13%,9.68%,7.53%, the accuracy were:0.016,0.016，0.017,0.023,0.036,0.021, the standard recovery rate experiment is done in accordancewith the experimental methods, recovery rate of copper, zinc, cobalt, nickel, chromiumand manganese is96.7～105.0%,97.0～104.5%,96.9～104.0%,96.9～103.2%,96.7～104.0%,97.8～103.9%The detection limit, precision, accuracy and recovery rate canreach the geological samples requirements that are1︰200000and1︰50000.Suifenhe, the worse forest farm of heilongjiang province, DongNingXian,pot-bellied sichuan1︰50000regional geological and mineral resources survey projectof5874pieces of stream sediment samples by the copper, zinc, cobalt, nickel,chromium, manganese element six clock analysis, inspection qualified rate, standardmaterial pass rate, abnormal values in selectiving examination qualified rate is over 90%, showed in this paper, we study the continuous determination of copper in streamsediment samples, zinc, cobalt, nickel, chromium, manganese six clock elementmethod, is simple, rapid and reliable.