Journal
DESALINATION AND WATER TREATMENT
Volume 266, Issue -, Pages 197-201Publisher
DESALINATION PUBL
DOI: 10.5004/dwt.2022.28634
Keywords
Malachite green; Spectrophotometry; Water sample; Determination
Categories
Funding
- Science Research Project of Education Department, Jilin Province, China from the 13th Five-Year Plan [JJKH20200265KJ]
- Natural Science Foundation of Jilin Provincial Science and Technology Department from the Science and Technology Development Program of Jilin Province, China [20180101180JC, 222180102051, KYC-JC-XM-2018-051]
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A new spectrophotometric method has been established for the determination of malachite green in water samples. The optimal conditions for the determination were determined and the method showed good linearity at a wavelength of 614 nm. The method was validated by investigating the effects of co-existing substances and evaluating the precision and accuracy of the results.
In this paper, a new spectrophotometric method was established for the determination of malachite green. The optimal pH for the determination of malachite green for the method is 4.0 with a suitable temperature of 35 degrees C. In a pH 4.0 acetic acid-sodium acetate buffer solution medium, the maximum absorption wavelength of malachite green was located at 614 nm. A good linearity is presented over the concentration range of 0-6.0 mu g/mL of malachite green and absorbance at this wavelength. The apparent molar absorption coefficient of the method was 7.43 x 10(4) L/(cm center dot mol) at 614 nm with a detection limit of 0.13 mu g/mL and a quantification limit of 0.43 mu g/mL. Then influences of thirty-three co-existing substances on the determination of malachite green were determined. The inter-day and intra-day relative standard deviation for polluted water sample is 0.60% and 0.83%, respectively. The present method was used for the determination of malachite green in a few kinds of water samples with good precision and accuracy. A rapid and accurate method has been established for the determination of malachite green in water samples.
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