CN219434766U - Simple device for measuring soil calcium carbonate by gas flow method - Google Patents

Abstract

The utility model discloses a simple device for measuring soil calcium carbonate by a gas flow method, which is characterized in that: including flat bottom plastics finger-shaped pipe (1), erlenmeyer flask (2), two-way piston (4), glass straight tube (5), right angle glass return bend (7), basic buret I (9), basic buret II (10), glass three-way pipe (12), the erlenmeyer flask (2) bottom is arranged in to flat bottom plastics finger-shaped pipe 1, rubber plug A (3) is airtight for erlenmeyer flask (2) bottleneck, peg graft two-way piston (4) and glass straight tube (5) on rubber plug A (3), basic buret I (9) and basic buret II (10) bottom mouth of pipe are connected with the both ends of glass three-way pipe (12) through the latex tube, the lower extreme of glass three-way pipe (12) is connected with latex tube B (13) that are equipped with glass pearl, rubber plug B (8) for the upper end of basic buret I (9) are airtight, rubber plug B (8) peg graft right angle glass return bend (7), right angle glass return bend (7) are connected with glass straight tube (5) through latex tube A (6). The utility model has simple and easily obtained structure and easy operation.

Description

Simple device for measuring soil calcium carbonate by gas flow method

Technical Field

The utility model belongs to the technical field of soil detection, and particularly relates to a simple device for measuring soil calcium carbonate by a gas flow method.

Background

The main component of carbonate in the soil is calcium carbonate, which has obvious influence on the pH value, nutrient status, colloid property and the like of the soil. In soil analysis and detection work, this item is also the basis for selecting a soil analysis method.

The existing method for detecting the soil calcium carbonate mainly comprises a capacity titration method and a gas flow method. The volumetric titration method is to drop back the residual acid with standard alkali after the excess standard acid acts on the soil sample. The method can only measure approximate results, and the amount of consumed acid cannot represent the real calcium carbonate content. The gas flow method is to measure the released CO after the acid acts on the soil sample at a certain temperature and atmospheric pressure ₂ The calcium carbonate content was calculated by volume. However, the existing device for measuring calcium carbonate by the air flow method is complex, components are not easy to obtain, even some components need to be customized, and the device is not easy to operate and has no popularization for non-professional technicians.

Disclosure of Invention

The utility model aims to overcome the defects and provide a simple device for measuring the soil calcium carbonate by a gas flow method, which has a simple and easily available structure and is easy to operate.

The utility model relates to a simple device for measuring soil calcium carbonate by a gas flow method, which comprises a flat bottom plastic finger-shaped pipe, a conical flask, a two-way piston, a glass straight pipe, a right-angle glass bent pipe, a basic burette I, a basic burette II and a glass three-way pipe, wherein: the bottom of the conical flask is provided with a flat bottom plastic finger-shaped pipe, the mouth of the conical flask is sealed by a rubber plug A, a two-way piston and a glass straight pipe are inserted on the rubber plug A, the pipe openings at the bottom ends of the basic burette I and the basic burette II are connected with the two ends of the glass three-way pipe through latex pipes, the lower end of the glass three-way pipe is connected with a latex pipe B filled with glass beads, the rubber plug B used at the upper end of the basic burette I is sealed, the rubber plug B is inserted with a right-angle glass bent pipe, and the right-angle glass bent pipe is connected with the glass straight pipe through the latex pipe A.

The simple device for measuring the soil calcium carbonate by the gas flow method, wherein: the right-angle glass bent pipe, the emulsion pipe A and the glass straight pipe are replaced by U-shaped glass pipes.

The simple device for measuring the soil calcium carbonate by the gas flow method, wherein: the glass beads of the latex tube B are replaced by water stop clamps.

The simple device for measuring the soil calcium carbonate by the gas flow method, wherein: the basic buret I and the basic buret II are fixed on a buret frame.

Compared with the prior art, the utility model has obvious beneficial effects, and the technical scheme can be adopted as follows: the latex tube B is internally provided with a glass bead which is used for controlling the flow speed and the flow quantity of liquid. The two-way piston is opened and closed to regulate the communication or isolation of the reaction system with the outside air. The parts of the utility model are all common standard parts, the structure is simple, the operation is easy, and the utility model can be used by non-professional technicians.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

The marks in the figure are as follows:

1. flat bottom plastic finger tubes; 2. a conical flask; 3. a rubber plug A; 4. a two-way piston; 5. a straight glass tube; 6. latex tube A; 7. a right angle glass elbow; 8. a rubber plug B; 9. basic burette I; 10. basic burette ii; 11. a burette stand; 12. a glass tee; 13. latex tube B.

Detailed Description

The following detailed description of the embodiments, structures, features and effects of a simple apparatus for measuring soil calcium carbonate according to the air flow method of the present utility model is given with reference to the accompanying drawings and preferred embodiments.

The utility model relates to a simple device for measuring soil calcium carbonate by a gas flow method, which comprises a flat bottom plastic finger-shaped pipe 1, a conical flask 2, a two-way piston 4, a glass straight pipe 5, a right-angle glass bent pipe 7, a basic burette I9, a basic burette II 10 and a glass three-way pipe 12, wherein: the bottom of the conical flask 2 is placed with the flat bottom plastic finger-shaped pipe 1, the bottle mouth of the conical flask 2 is sealed by a rubber plug A3, a two-way piston 4 and a glass straight pipe 5 are inserted on the rubber plug A3, an alkali burette I9 and an alkali burette II 10 are fixed on a burette rack 11, pipe orifices at the bottom ends of the two are connected with two ends of a glass three-way pipe 12 through latex pipes, the lower end of the glass three-way pipe 12 is connected with a latex pipe B13 filled with glass beads for controlling the flow rate and flow rate of liquid, a rubber plug B8 used at the upper end of the alkali burette I9 is sealed, a right-angle glass bent pipe 7 is inserted on the rubber plug B8, and the right-angle glass bent pipe 7 is connected with the glass straight pipe 5 through a latex pipe A6.

The right-angle glass bent pipe 7 is connected with the glass straight pipe 5 on the conical flask 2 through the latex pipe A6, and the component can be replaced by a U-shaped glass pipe.

The glass beads of the latex tube B13 can be replaced by water stop clamps.

Working principle: before use, the air tightness of the utility model is checked to ensure that the utility model is airtight; injecting 0.5mol/L sulfuric acid colored solution (added with methyl red indicator) from the upper part of the basic buret II 10, and reading the scale on the basic buret I9 after the liquid surfaces of the basic buret II 10 and the basic buret I9 are leveled; the soil sample was weighed into a conical flask 2, moistened with a small amount of water, and filled with 10.00ml 1:3, clamping the flat-bottom plastic finger-shaped pipe 1 of hydrochloric acid by using V-shaped long tweezers, and lightly putting the flat-bottom plastic finger-shaped pipe into the bottom of the conical flask 2; the conical flask 2 is closed with a plug A3 and the two-way piston 4 is closed (isolated from the outside air). Tilting the conical flask 2 to enable a small amount of hydrochloric acid in the flat-bottom plastic finger-shaped tube 1 to flow out, preventing the reaction from being too violent, mixing all the hydrochloric acid in the flat-bottom plastic finger-shaped tube 1 with a sample when the liquid level of the basic burette I9 begins to descend, fully shaking, and slowly draining by controlling glass beads in the latex tube B13; when the liquid level falling speed in the basic burette I9 is less than 0.5ml & gtmin ^-1 And stopping shaking, stopping draining when the liquid level in the basic buret II is reduced to be in the same horizontal plane with the liquid level in the basic buret I, and immediately reading the scale number on the basic buret I.

While measuring soil samples, 5 samples each are inserted with a calcium carbonate standard substance as a reference, namely 0.15g (accurate to 0.001 g) of anhydrous calcium carbonate is weighed into the conical flask 1, and the rest operation steps are the same as the measurement of the samples.

The conical flask had to be of uniform gauge and volume for each measurement.

And simultaneously measuring the standard substance of calcium carbonate and the soil sample at a certain temperature and under the atmospheric pressure, and comparing the volume of carbon dioxide generated by the soil sample with the volume of carbon dioxide generated by a certain amount of the standard substance of calcium carbonate to calculate the mass of the calcium carbonate contained in the soil sample.

The foregoing description is only a preferred embodiment of the present utility model, and is not intended to limit the utility model in any way, and any simple modification, equivalent variation and variation of the above embodiment according to the technical matter of the present utility model still fall within the scope of the technical scheme of the present utility model.

Claims (4)

1. A simple device for measuring soil calcium carbonate by a gas flow method is characterized in that: including flat bottom plastics dactylotheca (1), erlenmeyer flask (2), two-way piston (4), glass straight tube (5), right angle glass return bend (7), basic buret I (9), basic buret II (10), glass three-way pipe (12), the erlenmeyer flask (2) bottom is arranged in to flat bottom plastics dactylotheca (1), rubber plug A (3) is airtight for erlenmeyer flask (2), peg graft two-way piston (4) and glass straight tube (5) on rubber plug A (3), basic buret I (9) and basic buret II (10) bottom mouth of pipe are connected with the both ends of glass three-way pipe (12) through the latex pipe, the lower extreme of glass three-way pipe (12) is connected with latex pipe B (13) that are equipped with glass pearl, rubber plug B (8) for the upper end of basic buret I (9) are airtight, right angle glass return bend (7) are pegged graft through latex pipe A (6) and glass straight tube (5) are connected.

2. The simple device for measuring the calcium carbonate in the soil by the air flow method according to claim 1, which is characterized in that: the right-angle glass bent pipe (7), the latex pipe A (6) and the glass straight pipe (5) are replaced by U-shaped glass pipes.

3. The simple device for measuring the calcium carbonate in the soil by the air flow method according to claim 1, which is characterized in that: the glass beads of the latex tube B (13) are replaced by water stop clamps.

4. The simple device for measuring the calcium carbonate in the soil by the air flow method according to claim 1, which is characterized in that: the basic burette I (9) and the basic burette II (10) are fixed on a burette stand (11).