LaMotte ST-M User Manual
MO LYB DE NUM TEST KIT
L
Mott
DROP COUNT TEST METHOD
MODEL MO-DC • CODE 3632
QUANTITY CONTENTS CODE
120 mL *Mo Buffer *3997-J
60 mL *Denatured Alcohol *3998-H
60 mL Mo Titrant 3999-H
0.25 g Sym-Diphenylcarbazone 4001-S
1 Pipet, 1.0 mL, plastic 0354
1 Pipet, 1.0 mL, plastic, w/cap 0372
1 Pipet, plain, glass, w/cap 0371
2 Test Tubes, 2.5-5-10-15-20 mL,
glass, w/caps
1 Plug, dropper tip 28831
1 Cap 28832
1 Label, Mo Indicator 37088-4000-H
*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 go to
www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail, phone or fax.
To order individual reagents or test kit components, use the specified code number.
0970-S
BE FORE TEST ING:
A. Replace the black cap on *Mo Buffer (3997) with the plastic pipet
assembly (0372).
B. Replace the black cap on Mo Titrant (3999) with the glass pipet
assembly (0371).
PREP A RA TION OF *MO IN DI CA TOR (4000-H)
*Mo Indicator (4000-H) must be
prepared when you receive the kit. If
stored in a cool, dark place, it can be used
for about 6 months.
1. Very carefully pour all of the
*Denatured Alcohol (3998) into the
bottle containing the
Sym-Dyphenylcarbazone (4001).
Cap and shake gently to mix.
2. Insert the dropper plug (28831) by
firmly pressing into the neck of the
bottle until you hear a snapping
sound. Recap bottle using cap
(28832).
3. Apply the Mo Indicator label (37088-4000-H)
over top of the label on the bottle.
NOTE: Consult MSDS.
SAM PLES LESS THAN 20 ppm MO LYB DE NUM
1. Fill two clean test tubes (0970-S) to the 10 mL line with sample
water.
2. Add 1.0 mL *Mo Buffer (3997) to each tube. Swirl to mix.
3. Holding bottle vertically, add 10 drops of *Mo Indicator (4000) to
each tube. Swirl to mix. Sample will turn pinkish-orange.
4. Use one tube as the “reference tube” and the other as the “sample
tube.”
TO THE REFERENCE TUBE
5. Fill pipet (0371) with Mo Titrant (3999). While gently swirling the
tube, add Mo Titrant (3999), one drop at a time, until pink color
changes to yellow, and no further color change occurs. Hold pipet
vertically.
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