The effects of pH and certain chelants on the precipitation of low concentrations of divalent copper, nickel and cadmium ions with sodium N, N-dimethyldithiocarbamate are described. Conditions under which turbidometry (nephelometry) may be used to monitor the precipitation reactions are also described. Speculation is offered concerning how equilibria and kinetic factors may explain the observed results.

Subject
Acids, Ions, Precipitation (solids), Precipitates, Chelation, Heavy metals, Turbidity, Acidity, Ion concentrations, Solutions, Metals, Mixing, Chemical reactions
Keywords:
copper, nickel, cadmium, EDTA, citric acid, chelants, turbidometry, sodium N, N-dimethyldithiocarbamate, precipitation
© 1993 Association for Materials Protection and Performance (AMPP). All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise) without the prior written permission of AMPP. Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
1993
Association for Materials Protection and Performance (AMPP)
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