JPS5815900Y2 - iron ion detector tube - Google Patents

Description

[Detailed Description of the Invention] In the present invention, a transparent capillary is filled with a coloring agent and an adsorbent for concentration, which are dissolved or dissolved in a solution.

Concerning iron ion detection tubes.

Recently, with the development of industry, river and sea pollution and air pollution have become social problems.

Currently, the measurement of hazardous substances such as heavy metal ions and organic substances contained in factory wastewater relies on JIS K 0102.

However, this method requires a long time for sample liquid pretreatment and measurement, and also requires extremely complicated operations.

Modern water quality surveys of industrial wastewater, rivers, and the sea require prompt information.

However, it is difficult to quickly obtain analytical information using the JIS K 0102 method.

For this reason, there is currently a strong desire to develop simple and rapid analytical methods and analytical instruments.

Therefore, the inventors of the present invention have conducted various studies on iron ion detection tubes that are excellent in terms of simplicity, speed, high sensitivity, and reproducibility, and have thus arrived at the present invention.

That is, the present invention newly creates a detection tube filled with 2,2'-bipyridyl as the coloring agent 3 and silica gel as the concentration adsorbent 2 inside the transparent capillary tube 1, and this sensing tube is placed with the coloring agent side facing. The iron ions dissolved or dissolved in the solution are allowed to rise into the detection tube by capillary action or are inhaled, and react with the coloring agent. The object of the present invention is to provide a detection tube that can perform qualitative and quantitative analysis of iron ions quickly and with high sensitivity by causing color development and then concentrating and adsorbing this colored band on a part of a concentration adsorbent.

This detection tube has an inner diameter of 3 mm or less, preferably 1.5 to 2 mm.
5 m1tts length 50 or more, preferably 90-10
It is produced by filling two layers of 2°2'-bipisodyl as a coloring agent and silica gel as an adsorbent for concentration inside a 0 mm transparent capillary.

Glass or polystyrene tubes are suitable for the thin tubes.

Silica gel, alumina, quartz sand,
We investigated cellulose, absorbent cotton, starch, P paper, etc., but found that silica gel was the best in terms of concentration adsorption, reproducibility of the color tone of the color band, quantitative performance, etc.

The length of these fillers is about 1 to 10 mm for the coloring agent;
Approximately 50 to 60 adsorbents for concentration are suitable.

The target substance is analyzed by comparing the color tone, density, etc. of the color band concentrated and adsorbed on the concentration adsorbent with a standard colorimetric table prepared in advance, and the present invention is completed.

The iron ion detector tube of this invention is filled with a substance that is easily movable, absorbs moisture, and deteriorates due to oxidation, so it should be fixed with absorbent cotton, replaced with nitrogen if necessary, and melt-sealed at both ends of the detector tube. It is preferable to provide the

When actually used, it is advisable to cut off the welded part with a cutter or the like.

Furthermore, if the container is filled with a coloring agent that is easily decomposed by light, it is sufficient to shield it from light.

When comparing the proposed method with conventionally known simple analysis methods such as the detection test paper method, the analysis method using a gas detection tube, and the p-paper spot test method, analysis is performed using chromogen generated from the target substance and a coloring agent. However, the method of the present invention, in which the color band is adsorbed and concentrated, has the feature of being able to analyze with high sensitivity.

The drawing is a sectional view showing an example suitable for implementing the present invention.

That is, the inside of the transparent thin tube 1 is filled with the coloring agent 3 and the concentration adsorbent 2.

These fillers are fixed by a filler fixing body 4 such as absorbent cotton.

When the detection tube prepared in this way is placed in a solution with the side filled with the color former facing down and the solution is raised to the upper end of the tube 1 or the concentration adsorbent 2, or when inhaled, the color former is dissolved in the solution. The iron ions contained or dissolved react with the coloring agent 3 to develop a color, and this colored band is separated, adsorbed, and concentrated on a part of the concentration adsorbent 2.

Next, the present invention will be explained according to examples, but the present invention is not limited thereto.

Example 1 Iron (divalent) ion A detection tube with an inner diameter of 1.5 to 2.5 mm and a length of 100 to 150 mm was filled with absorbent cotton, a coloring agent, absorbent cotton, an adsorbent for concentration, and absorbent cotton in order from the bottom. Create.

As a coloring agent, about 1 to 5 cm of 2,2'-bipyridyl is added.

As an adsorbent for concentration, silica gel (100 to 200 m
esh) for 50 to 60 fights.

The lower end of the detection tube thus prepared was inserted into the sample solution (pH 3).
(Below) Put it inside.

The sample solution rises due to capillary action, and a pink colored band is produced by adsorption and concentration from the lower end of the concentration adsorbent depending on the amount of iron (divalent) ions in the sample solution.

When the sample solution rises to the top of the concentration adsorbent, take it out and compare it with the standard colorimetric table to determine the iron (divalent) in the sample solution.
The concentration of ions is obtained.

The detection limit for iron (2) ions by this method is 1 ppm as iron ions.

[Brief explanation of the drawing]

The drawing is a sectional view showing an example suitable for implementing the present invention. FIG. 1 shows the principle, and FIG. 2 shows the whole.

Claims (1)

[Scope of utility model registration request] Adsorption for concentration, characterized in that the interior of the transparent capillary 1 is filled with 2,2' bipyridyl as the coloring agent 3 and silica gel as the adsorbent for concentration 2 in two layers, and the side filled with the coloring agent is the part in contact with the sample liquid. An iron ion detection tube that detects the concentration of iron ions in a sample solution by comparing the colored band concentrated and adsorbed on the agent part with a standard colorimetric solution.