DEVELOPMENT OF TEST KIT SOLUTIONS TO DETERMINE IRON CONTENT IN NATURAL WATER SOURCES

Tóm tắt

In this study, a solution-test kit was developed to determine a variety of iron contents and give quick results on site. Three color tables representing different iron contents were studied: color table 1 (0–1 mg/L), color table 2 (0–10 mg/L), and color table 3 (0–100 mg/L), with each color table corresponding to a specific test kit. The results showed a high linearity between color intensity and iron content from the 3 color tables, with the results always greater than 0.9. In addition, this test kit can also determine the content of different types of iron (Fe2+, Fe3+ and total iron) in water sources. The comparison results of the iron content prepared in the laboratory (S1, S2, and S3 samples) analyzed using the test kit (through the color intensity created from Fe(SCN)3 and the analysis method TCVN 6177: 1996 (ISO 6332: 1988 (E) showed that the deviation was less than 5%. Besides, the iron-containing water samples (SN1, SN2, and SN3) from nature also gave similar deviation results to those of samples created in the laboratory. Moreover, with the color differences in the chart, the test kit can quickly determine the iron content, similar to the pH determination method using a color chart. The test kit has demonstrated its high applicability by determining the iron content over a wide range (from 0 to 100 mg/L) to assess water quality for agricultural and aquaculture activities.

Từ khóa: Iron-containing water, iron test kit, iron removal treatment, iron analysis, Iron concentration color chart

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