LaMotte SMART 2 Electronic Soil Lab - Manual (Page 61)

COPPER
DIETHYZDITHIOCARBAMATE METHOD
CODE M3639-46-65-SC
QUANTITY CONTENTS CODE
15 mL *Copper 1 *6446-E
*WARNING: Reagents marked with a * are considered to be potential health hazards. To view
or print a Material Safety Data Sheet (MSDS) for these reagents see MSDS CD or
www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail, phone or fax.
Like many other micronutrients, the amount of available copper varies
considerably with the type of soil. Well drained sandy soils are usually low in
copper while heavily clay-type soils contain an abundant supply of copper. Like
manganese, copper may be unavailable in soils that have a high organic
make-up because it readily forms insoluble complexes with organic compounds.
Generally from 0.2-25 lb/acre of copper is added to the soil to correct a
deficient level. Copper is another metal that is necessary in the formation of
the chlorophyll molecule and like other metals, e.g. iron, manganese and zinc
acts as a catalyst.
RANGE: 0.00-30.00 ppm Copper
METHOD: Cupric ions form a yellow colored chelate with
Diethyldithiocarbamate around pH 9-10, in
proportion to the concentration of copper in the
sample.
INTERFERENCES: Bismuth, cobalt, mercury, nickel and silver ions and
chlorine (6 ppm or greater) interfere seriously and
must be absent.
SMART2 SOIL MANUAL 1.07 61