doi:10.1002/nadc.20040520239Ellmer, ReinholdWiley‐VCH Verlag GmbH & Co. KGaANachrichten Aus Der Chemie
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If the OC and the Fe concentration in the extracted solutions are high, the Chelex 100 became essential in clean up the metallic ions. Both the NaOH and Chelex 100 and the HCl‐NaOH‐Chelex produced satisfactory results and the later procedure by far the best resolved spectra....