LaMotte SMART 2 Electronic Soil Lab - Manual (Page 63)

IRON
BIPYRIDYL METHOD 3648-SC
QUANTITY CONTENTS CODE
30 mL *Iron Reagent #1 *V-4450-G
5 g *Iron Reagent #2 Powder *V-4451-C
1 Pipet, 0.5 mL 0353
1 Spoon, 0.1 g 0699
*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.
Iron is essential to the formation of chlorophyll, and iron deficiency causes
chlorosis. While most soils contain abundant iron, only a fraction is soluble
and readily available to the growing plant. This is particularly true in neutral or
alkaline soils. Acid soils contain higher levels of available iron.
RANGE: 0.00-30.00 ppm Iron
METHOD: Ferric iron is reduced to ferrous iron and subsequently
forms a colored complex with bipyridyl for a
quantitative measure of total iron.
INTERFERENCES: Strong oxidizing agents interfere, as well as copper
and cobalt in excess of 5.0 mg/L
SMART2 SOIL MANUAL 1.07 63