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Phos pho rus, Con duc tiv ity – LaMotte Greenhouse Soil Testing Outfit GS-01 User Manual

Page 7

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PHOS PHO RUS

QUANTITY

CONTENTS

CODE

60 mL

*VM Phosphate Reagent

*4410-H

30 mL

*Reducing Reagent

*6405-G

2

Pipets, 1.0 mL, plastic

0354

1

Pipet, plain

0352

2

Test Tubes, 5 mL, glass

0230

1

Phosphorus Comparator

5274

*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 proceeding.

PRO CE DURE
1.

Use a 1 mL pipet (0354) to add 1 mL of soil extract to a test tube
(0230). Dilute to 5 mL line with deionized water.

2.

Use a second 1 mL pipet (0354) to add 1 mL of *VM Phosphate
Reagent (4410). Cap and mix. Wait 5 minutes.

3.

Use the plain pipet (0352) to add 3 drops of *Reducing Reagent
(6405). Cap and invert to thoroughly mix contents.

4.

Insert test tube into the Phosphorus Comparator (5274). Match
sample color to a color standard. Record as ppm Phosphorus.

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CON DUC TIV ITY

QUANTITY

CONTENTS

CODE

1

Test Chamber

0966

1

Conductivity Meter

26094-22C

Read the Conductivity Meter Instruction Manual before proceeding.

PRO CE DURE
1.

Fill plastic test chamber (0966) with soil extract.

2.

Insert the conductivity probe.

3.

Measure the conductivity. Multiply reading by 0.7. Record as ppm
Soluble Salts.

4.

Remove probe and transfer extract to the probe column (0945) for
the pH test. Rinse probe and test chamber with deionized water.

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