LaMotte Greenhouse Soil Testing Outfit GS-02 - Manual (Page 3)

CAL CIUM AND MAG NE SIUM
The Schwarzenbach EDTA titration, used to determine calcium and
magnesium levels, involves two separate titrations. The first titration
determines the combined calcium and magnesium level, and the second
titration indicates the calcium level only. Magnesium is determined by
calculation.
Carefully read the Direct Reading Titrator Instruction Manual before
performing titrations.
QUAN TITY CON TENTS CODE
30 mL Calcium-Magnesium Inhibitor Reagent 3922-G
30 mL *Calcium & Magnesium Buffer *5126-G
2 x 15 mL *CM Indicator Reagent *6522-E
250 mL Standard EDTA Reagent 5254-K
15 mL *Inhibitor Solution *9258-E
15 mL *TEA Reagent *3921-E
30 mL *Sodium Hydroxide Reagent
w/Metal Inhibitors
*4259-G
100 Calcium Hardness Indicator Tablets T-5250-J
1 Graduated Cylinder, glass, 25 mL 0417
1 Beaker, plastic, 50 mL 0944
1 Test Tube, 5-10-15 mL, w/cap 0778
1 Direct Reading Titrator, 0 - 1000 range 0384
*WARNING: Reagents marked with a * are considered hazardous substances.
Material Safety Data Sheets (MSDS) are supplied for these reagents. for your
safety, read label and accompanying MSDS before using.
DI LU TION OF SOIL EX TRACT
1.
Use the graduated cylinder (0417) to transfer 10 mL of soil extract to
a 50 mL beaker (0944).
2. Add 10 mL of deionized water. Mix.
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AC CES SORIES
QUAN TITY CON TENTS CODE
1 Demineralizer Bottle 1155
1 Graduated Cylinder, 25 mL, glass 0417
6 Syringes, 60 mL, plastic 0943
6 Beakers, 50 mL, plastic 0944
2 Filter Paper, 2.5 cm, 100/pk 0947
1 Extraction Stand 1110
To order individual reagents or test kit components, use the specified code
number.
USE OF THE OCTET COM PARA TOR
The Octet Comparator contains eight permanent
color standards. A test sample is inserted into the
openings in the top of the comparator. The sample
can then be compared to four color standards at
once, and the value read off the comparator. For
optimum color comparison, the comparator should
be positioned between the operator and a light
source, so that the light enters through the special
light-diffusing screen in the back of the
comparator. Avoid viewing the comparator against
direct sunlight or an irregularly lighted
background.
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