Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for automatically measuring concentration of dissolved substance

a technology of dissolved substance and automatic measurement, which is applied in the direction of instruments, investigating moving fluids/granular solids, and using chemical indicators. it can solve the problems of damage to the apparatus, wrong judgment of the quality of the sample water, and inability to add a part of reagents to the sample water, so as to avoid the effect of complicating the apparatus and low cos

Inactive Publication Date: 2015-11-05
KURITA WATER INDUSTRIES LTD
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a method for reliably judging the presence or absence of the addition of two kinds of reagents relative to a sample of water. This can be done by adding a selected acid-base indicator to one of the reagents, or by adding a selected acid-base indicator and a pH regulator to one of the reagents, and adding another pH regulator to the other reagent. This method is cost-effective and highly reliable, as it can be carried out using a simple light emitting device and light receiving device. Additionally, the invention provides a method for reliably judging the pH value of the sample water, which can prevent errors in the measurement of dissolved substances due to unusual pH values.

Problems solved by technology

However, in such a monitoring apparatus, it may cause a case wherein a part of reagents is not added to the sample water because of a bad condition of a reagent pump or the depleting of the reagent.
This may cause not only a wrong judgment of the quality of the sample water due to a lack of a correct measuring result, but also a problem of damaging the apparatus under the effect of other reagents.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for automatically measuring concentration of dissolved substance
  • Method for automatically measuring concentration of dissolved substance
  • Method for automatically measuring concentration of dissolved substance

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0037]First, with reference to FIG. 1, a concentration measuring apparatus for carrying out the present invention will be explained.

[0038]A concentration measuring apparatus 1 automatically measures concentration of a specific dissolved substance in a sample water W0 sampled from a target water system, for example, such as an industrial water system or a domestic water system by absorptiometry. In the concentration measuring apparatus 1, the concentration of the specific dissolved substance is measured using an absorbance of a light obtained by transmitting a light to a measuring water developed a color by adding two kinds of reagents respectively to the sample water W0. Incidentally, in order to measure the concentration of the specific dissolved substance, it is necessary to add the two kinds of reagents separately to the sample water W0.

[0039]As shown in FIG. 1, the concentration measuring apparatus 1 includes a measuring cell 2 wherein a colored measuring water W1 or a clear pre...

second embodiment

[0084]Next, the method for automatically measuring concentration of a dissolved substance according to another embodiment of the present invention will be explained with reference to FIG. 6 to FIG. 8. In this method, especially, there are judged the presence or absence of the addition of the reagent, and the presence or absence of an unusual pH value of the sample water W0.

[0085]The method for automatically measuring concentration of a dissolved substance includes the step of making the measuring water, the step of calculating the concentration of the dissolved substance, and the like, and as the characteristic steps, as shown in FIG. 6 to FIG. 8, includes a step K5 of selecting the acid-base indicator; a step K6 of preparing the reagents; a step K7 of calculating the absorbances; and a step K8 of judging the presence or absence of the addition of the reagent. Incidentally, for the concentration measuring apparatus 1, the same apparatus explained in the first embodiment is used so a...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

In measuring a dissolved substance, a concentration of a specific dissolved substance in a sample water is measured using a measuring water W1 developing a specific color within a specific pH range by adding each of two reagents to a sample water W0, and an acid-base indicator S developing different colors other than a specific color is selected in a first pH range including the specific pH range and a second pH range deviating from the first pH range. Next, a reagent is prepared by adding the acid-base indicator to one reagent wherein a pH value of a reagent added water where the two kinds of reagents are separately added to the sample water is within the second pH range. Next, absorbance values are calculated by three region component lights which are a transmitted light in the measuring water where the prepared reagent is added.

Description

FIELD OF TECHNOLOGY[0001]The present invention relates to a method for automatically measuring concentration of a dissolved substance, which can also judge the presence or absence of addition of a reagent in a case wherein the concentration of the dissolved substance is measured using absorbance of a transmitted light which results from a light to penetrate a measuring water made by adding the reagent to a sample water.BACKGROUND ART[0002]It is necessary to monitor the quality of water used in facilities using an online monitoring apparatus in order to stably and effectively operate a water utilizing facility. In such a monitoring apparatus, for example, the concentration of a specific dissolved substance in the sample water is automatically measured by absorptiometry. In that case, in the absorptiometry, it is necessary to make measuring waters in which colors are developed by respectively adding, for example, a plurality of kinds of reagents to sample waters, and transmit lights t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01N21/80
CPCG01N21/80G01N21/85G01N21/78
Inventor TAKAHASHI, JUNICHI
Owner KURITA WATER INDUSTRIES LTD