중금속 흡광도 측정에서 탁도 보정 기법의 적용
Application of Two-wavelength Absorbance Photometryin Turbid Water Samples
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초록
As turbidity can cause errors in measurements when absorbance photometry is used to determine the concentrations of heavy metal ions in real water samples (such as discharged water and industrially process water), fine solid particles should be removed during the sampling and/or sample preparation. However, complete removal is not always possible, and when an absorbance measurement needs to be carried out on a sample that is still turbid, a proper compensation method should be applied. In this short communication, accuracy was improved by means of a simple two-wavelength photometric method when absorbance was used to determine the concentrations of metal ions in samples of turbid water. The absorbance error decreased from 62.4~488% to 5.13~20.3% after the compensation method was applied.
Abstract
As turbidity can cause errors in measurements when absorbance photometry is used to determine the concentrations of heavy metal ions in real water samples (such as discharged water and industrially process water), fine solid particles should be removed during the sampling and/or sample preparation. However, complete removal is not always possible, and when an absorbance measurement needs to be carried out on a sample that is still turbid, a proper compensation method should be applied. In this short communication, accuracy was improved by means of a simple two-wavelength photometric method when absorbance was used to determine the concentrations of metal ions in samples of turbid water. The absorbance error decreased from 62.4~488% to 5.13~20.3% after the compensation method was applied.
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