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The humus content of soil samples

The humus content of soil samples

LB3.2.2.4C

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Description

In this experiment, the students are introduced to methods for testing the humus content of soil samples. They examine the humic content of the soil samples with ammonia solution and measure the pH value of the soil samples with the Mobile-CASSY. They realise that the detection methods are based on humic acids, as a natural component of humic soils.

Components of equipment sets

2	30121 8	Stand base MF
3	301271 4	Stand rod 40 cm, 10 mm Ø
4	30109 4	Bosshead S
1	665754 4	Measuring cylinder 100 ml, with plastic base
1	665212 4	Glass stirring rod 200 x 8 mm Ø
1	30945 4	Universal pencil
1	664131 4	Beaker Boro 3.3, 400 ml, squat
4	602022 4	Beaker Boro 3.3, 100 ml, squat
6	59121 4	Clip plug, large
3	665240 4	Plastic tube 240 x 25 mm Ø
2	301261 4	Stand rod 25 cm, with holes
3	667258 8	Rubber stopper, one 7-mm hole, 19...24 mm Ø
3	6652011	Glass tube 80 mm x 8 mm Ø
1	524005W2	Mobile-CASSY 2 WiFi
1	524452 8	pH Adapter M
1	529673 8	pH combination electrode, BNC
1	6744640 4	Buffer solution pH 4.00, 250 ml
1	6744670 4	Buffer solution pH 7.00, 250 ml
1	6753410 4	Water, pure, 5 l
1	6721200 4	Glycerol, 99 %, 100 ml
1	6703650 4	Ammonia solution, diluted, 2 mol/l, 500 ml Danger H315 H318
1	6753550 4	Cotton wad, 200 g

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The humus content of soil samples

Description

Components of equipment sets

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