LaMotte SMART Spectro Spectrophotometer - Manual (Page 204)

OXYGEN SCAVENGERS
TEST FOR DEHA (DIETHYLHYDROXYLAMINE), CARBOHYDRAZIDE,
ERYTHORBIC ACID, HYDROQUINONE, METHYLETHYLKETOXIME
IRON REDUCTION METHOD • CODE 4857-01
QUANTITY CONTENTS CODE
15 mL *DEHA Reagent #1 *4791-E
15 mL *DEHA Reagent #2 *4792-E
15 mL *DEHA Reagent #3 *4793-E
*WARNING: Reagents marked with an * are considered to be potential health
hazards. To view or print a Material Safety Data Sheet (MSDS) for these reagents
go to www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail,
phone or fax.
Oxygen can lead to corrosion in many parts of a boiler. Oxygen scavengers are
added to the water to eliminate oxygen and thus decrease the chance of corrosion.
Diethylhydroxylamine (DEHA) is a volatile oxygen scavenger used in boilers. It can
also passivate steel and has a low toxicity.
APPLICATION: Boilers
RANGE: 0.000–0.700 ppm DEHA (Diethylhydroxylamine)
0.000–0.900 ppm Carbohydrazide
0.00–3.00 ppm Erythorbic Acid
0.00–1.80 ppm Hydroquinone
0.00–3.00 ppm Methylethylketoxime
MDL: 0.005 ppm DEHA
0.005 ppm Carbohydrazide
0.02 ppm Erythorbic Acid
0.01 ppm Hydroquanine
0.02 ppm Methylethylketoxime
METHOD: Ferric iron is reduced to ferrous iron by oxygen
scavengers in proportion to the concentration in the
sample. The resulting ferrous iron reacts with an
indicator to produce a purple color.
SAMPLE HANDLING
& PRESERVATION:
Analyze samples immediately. Rinse sample containers
and glassware with 1:1 hydrochloric acid to avoid iron
contamination.
INTERFERENCES: Other oxygen scavengers, such as DEHA,
carbohydrazide, erythorbic acid, hydroquinone and
methylethylketoxime will interfere. Stray light and
substances which complex iron or reduce ferric iron will
also interfere.
SMART Spectro Test Procedures 2.11 OXYGEN SCAVENGERS
Test P
rocedures