JP2002131305A - Method for simultaneously measuring concentration of a plurality of constituents by using detector tube and measuring instrument for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make simultaneously measurable the concentration of a plurality of constituents in a sample. SOLUTION: Such a collective detector tube that is made by housing a plurality of detector tubes different in object of measurement in one transparent holder is used. Their images are fetched by a computer via a camera. The length of transition interval of each image is measured by using image analyzing software.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for simultaneously measuring the concentration of a plurality of components in a sample using a plurality of detection tubes having different measurement targets.

[0002]

2. Description of the Related Art In a conventional method for measuring the concentration of a plurality of components in a sample using a detector tube, first, a detector tube of one type to be measured is attached to a quantitative syringe, the sample is aspirated, and the scale and discoloration of the detector tube are changed. The density was read by visually comparing the areas, and when further temperature correction was required, the correction coefficient was obtained from the table to correct the density. The measurement was performed by repeating this for a plurality of components, but in this case, the measurement was manually performed, which required expense and time, and there was a concern about the accuracy due to the difference in the sampling time of the plurality of components. However, it is difficult to adjust the sampling amount because of the use of a single detection tube.

[0003]

SUMMARY OF THE INVENTION The present invention opens a path for simultaneous measurement of the concentration of a plurality of components using a detection tube, and further uses an automatic switching device for a plurality of collective detection tubes for a long period of time. Automatic measurement is also possible, and solves the problems of the conventional measurement technology comprehensively.

[0004]

SUMMARY OF THE INVENTION The present invention is a method and apparatus for simultaneously measuring the concentrations of a plurality of components described below. (1) A sample is simultaneously flowed into a plurality of detection tubes having different measurement targets, each flow rate and an image of the detection tube are taken into a computer by a camera, and the length of the discoloration area of each sample is measured by image analysis software. A simultaneous measurement method for a plurality of component concentrations. (2) The method for simultaneously measuring the concentration of a plurality of components according to the above (1), wherein a collective detection tube in which a plurality of detection tubes having different measurement targets are placed in one transparent holder is used. (3) A collective detector tube in which a plurality of detector tubes having different measurement targets are placed in one transparent holder, an introduction tube for introducing a sample into the collective detector tube, and a temperature sensor for measuring the temperature of the sample are attached. An inlet cover, a suction cover with a suction tube for sucking the sample from the collective detector tube, a flow meter for measuring the sample flow rate of each detector tube, and an electromagnetic valve for controlling the sample introduction time A flow control valve for adjusting the sample flow rate, a pump for aspirating the sample, an illuminator for illuminating the collective detector tube, a camera for inputting an image of the collective detector tube, Activate bulb, illuminator,
Controller for taking in pump operation, temperature data, flow rate data and image data, and length of discoloration area of multiple components obtained from analysis of temperature data, flow rate data and image data obtained from controller via communication line A simultaneous measurement apparatus for a plurality of component concentrations using a detection tube, comprising: a computer for calculating a concentration from the data and displaying and storing data.

[0005]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a simultaneous measurement apparatus according to the present invention. Between the introduction cover 3 and the suction cover 6, hydrogen sulfide,
After attaching the collective detector tube 4 in which three detector tubes 5 for sulfurous acid gas and nitrite gas are placed in one transparent holder, the following (a) start cycle, (b) measurement cycle, (c) judgment cycle , (D) Simultaneous measurement of the concentration of a plurality of components through an end cycle. (A) In the start cycle, the controller 14 turns on the illuminator 12 in response to a start command from the computer 16, and then operates the pump 11 for aspirating the sample. (B) In the measurement cycle, the controller 14 operates the computer 16 according to a measurement command from the computer 16.
Open the specified electromagnetic valve 10 and aspirate the environmental sample at a predetermined flow rate respectively set by the flow rate adjustment valve 9 via the introduction pipe 1, the detection pipe 5, the suction pipe 7, and the flow meter 8 for a certain period of time. After that, the electromagnetic valve 10 is closed, the temperature data, the flow data and the image data from the temperature sensor 2, the flow meter 8 and the camera 13 are taken in, and sent to the computer 16 via the communication line 15. (C) In the determination cycle, the length of each discoloration area is measured from the obtained image data by image analysis software, and it is determined whether or not the length of the discoloration area exceeds the lower limit. If the number of times of suction is less than the specified value, the measurement cycle of (b) is repeated by designating only the valve of the insufficient line. If the length of the discoloration area of all lines exceeds the lower limit or the number of suctions exceeds the specified value, the following (d)
Execute the end cycle of. (D) In the end cycle, after the end command from the computer 16 causes the controller 14 to stop the pump 11 and turn off the illuminator 12, the computer 16 returns to the temperature of the sample of each line obtained from the controller 14. The concentrations of hydrogen sulfide, sulfurous acid gas, and nitrous acid gas are calculated from the average value of the data, the sum of the flow rate data for each measurement cycle, and the length of the discoloration area obtained in the determination cycle of (c).

FIG. 2 shows the collective detection tube 4 used in FIG.
FIG. A plurality of detection tubes 5 having different measurement targets are put in one transparent holder 17, and both ends are provided with an adhesive 2.
0, fix to the transparent holder 17, and after the adhesive 20 is solidified,
Both ends are cut to a prescribed length, and the double sheet including the rubber sheet 18 and the holding sheet 19 is fixed with an adhesive that does not affect the detection agent 22 positioned by the upper and lower detection agent retainers 21. .

[0007] The tips of the introduction tube 1 and the suction tube 7 attached to the introduction cover 3 and the suction cover 6 are cut obliquely like an injection needle, and inserted into the double sheets at both ends of the collective detection tube 4. By doing so, the collective detection tube 4 and the introduction tube 1
And the suction pipe 7 is airtightly connected.

[0008]

The present invention is implemented as described above, and has the following effects.

According to the present invention, a sample is simultaneously flowed into a plurality of detection tubes having different measurement targets, and the respective flow rates and images of the detection tubes are taken into a computer by a camera. Since the measurement is performed using analysis software, the concentration of a plurality of components in a sample can be measured simultaneously.

According to the present invention, a collective detection tube in which a plurality of different detection tubes to be measured are placed in one transparent holder, an introduction tube for introducing a sample into the collective detection tube, and a temperature of the sample are measured. Introductory cover with temperature sensor attached, Suction cover with aspirating tube for aspirating sample from collective sensing tube, Flow meter for measuring sample flow rate of each sensing tube, Sample introduction time An electromagnetic valve for control, a flow control valve for adjusting the sample flow rate, a pump for aspirating the sample, an illuminator for illuminating the collective detector tube, and inputting an image of the collective detector tube And a controller to capture electromagnetic data, actuation of illuminators, operation of pumps, temperature data, flow rate data and image data. A computer for displaying and saving data while calculating the density from the length of the discoloration gamut of a plurality of components obtained from the analysis of temperature data, flow rate data and image data obtained through a communication line from A simultaneous measurement device for a plurality of component concentrations using a high-precision detection tube can be obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a simultaneous measurement device of the present invention.

FIG. 2 is a longitudinal sectional view showing a collective detection tube of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Introductory pipe 2 Temperature sensor 3 Introducing cover 4 Collecting detecting pipe 5 Detecting pipe 6 Suction cover 7 Suction pipe 8 Flow meter 9 Flow control valve 10 Electromagnetic valve 11 Pump 12 Illuminator 13 Camera 14 Controller 15 Communication line 16 Computer 17 Transparent holder 18 Rubber sheet 19 Holding sheet 20 Adhesive 21 Detecting agent holder 22 Detecting agent

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2G042 AA01 BB07 BB12 BB14 CB01 FB06 2G059 AA01 BB01 CC06 DD12 EE02 FF01 KK04 MM05 MM09 PP01

Claims (3)

[Claims] 1. A sample is simultaneously flowed into a plurality of detection tubes having different measurement targets, and the respective flow rates and images of the detection tubes are taken into a computer by a camera, and the length of the discoloration area of each sample is measured by image analysis software. A method for simultaneously measuring the concentration of a plurality of components, which comprises measuring. 2. The method for simultaneously measuring the concentration of a plurality of components according to claim 1, wherein a collective detection tube in which a plurality of detection tubes having different measurement targets are placed in one transparent holder is used. 3. A collective detector tube in which a plurality of different detectable tubes are placed in one transparent holder, an inlet tube for introducing a sample into the collective detector tube, and a temperature sensor for measuring the temperature of the sample. An attached inlet cover, a suction cover with an attached suction tube for aspirating the sample from the collective detector tube, a flow meter for measuring the sample flow rate of each detector tube, and a controller for controlling the sample introduction time. An electromagnetic valve, a flow control valve for adjusting the sample flow rate, a pump for aspirating the sample, an illuminator for illuminating the collective detector tube, and a camera for inputting an image of the collective detector tube Actuator of electromagnetic valve, actuation of illuminator, actuation of pump, controller to capture temperature data, flow rate data and image data, and communication line from controller to controller A computer for calculating the density from the lengths of the discoloration areas of a plurality of components obtained from the analysis of the temperature data, flow rate data and image data obtained by the computer, and displaying and storing the data. For simultaneous measurement of multiple component concentrations.