Determination of cadmium in vegetables by sequential injection analysis method using 8-hydroxyquinoline as complexing agent

© 2019, Chiang Mai University. All rights reserved. In the present study, a novel and eco-friendly sequential injection analysis (SIA) system with spectrophotometric detection was developed for determination of Cd(II) in vegetable samples. The method is based on the reaction of 8-hydroxyquinoline wi...

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Main Authors: Kanokwan Chaiyasing, Boonsom Liawruangrath, Surapol Natakankitkul, Sakchai Satienperakul, Wasan Sirisungworawong, Narabhats Rannurags, Saisunee Liawruangrath
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Published: 2019
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http://cmuir.cmu.ac.th/jspui/handle/6653943832/65398
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spelling th-cmuir.6653943832-653982019-08-05T04:43:26Z Determination of cadmium in vegetables by sequential injection analysis method using 8-hydroxyquinoline as complexing agent Kanokwan Chaiyasing Boonsom Liawruangrath Surapol Natakankitkul Sakchai Satienperakul Wasan Sirisungworawong Narabhats Rannurags Saisunee Liawruangrath Biochemistry, Genetics and Molecular Biology Chemistry Materials Science Mathematics Physics and Astronomy © 2019, Chiang Mai University. All rights reserved. In the present study, a novel and eco-friendly sequential injection analysis (SIA) system with spectrophotometric detection was developed for determination of Cd(II) in vegetable samples. The method is based on the reaction of 8-hydroxyquinoline with Cd(II) as a less-toxic complexing agent in H2SO4 solution, resulting in a light yellow colored complex monitored at 360 nm. The SIA parameters were optimized to obtain the best sensitivity and minimum reagent consumption. Under the optimum conditions, linear calibration graphs over the ranges of 0.04-1.0 mg L-1 and 1.5-5.0 mg L-1 were established. Due to the limitation of Beer’s law, the maximal absorption of the complex was observed at Cd(II) concentration of 1.0 mg L-1. Above which the absorbance decreased with curvature and started to be linear with low slope. The useful calibration graph for Cd(II) in vegetable sample was the first one. The limit of detection was 0.01 mg L-1, with the intra-day and inter-day precisions were less than 1.5%. The proposed method was successfully applied to the determination of Cd(II) in different vegetable samples (chinese kale, false pakchoi, cabbage, lettuce, cucumbers, coriander, water convolvulus, yard long bean, tomatoes, and potatoes) after appropriate sample pretreatment. The obtained results were in good agreement with those obtained by the ICP-MS standard method, verified by the student t-test at the 95% confidence level. 2019-08-05T04:32:40Z 2019-08-05T04:32:40Z 2019-03-01 Journal 01252526 2-s2.0-85068014786 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85068014786&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/65398
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Biochemistry, Genetics and Molecular Biology
Chemistry
Materials Science
Mathematics
Physics and Astronomy
spellingShingle Biochemistry, Genetics and Molecular Biology
Chemistry
Materials Science
Mathematics
Physics and Astronomy
Kanokwan Chaiyasing
Boonsom Liawruangrath
Surapol Natakankitkul
Sakchai Satienperakul
Wasan Sirisungworawong
Narabhats Rannurags
Saisunee Liawruangrath
Determination of cadmium in vegetables by sequential injection analysis method using 8-hydroxyquinoline as complexing agent
description © 2019, Chiang Mai University. All rights reserved. In the present study, a novel and eco-friendly sequential injection analysis (SIA) system with spectrophotometric detection was developed for determination of Cd(II) in vegetable samples. The method is based on the reaction of 8-hydroxyquinoline with Cd(II) as a less-toxic complexing agent in H2SO4 solution, resulting in a light yellow colored complex monitored at 360 nm. The SIA parameters were optimized to obtain the best sensitivity and minimum reagent consumption. Under the optimum conditions, linear calibration graphs over the ranges of 0.04-1.0 mg L-1 and 1.5-5.0 mg L-1 were established. Due to the limitation of Beer’s law, the maximal absorption of the complex was observed at Cd(II) concentration of 1.0 mg L-1. Above which the absorbance decreased with curvature and started to be linear with low slope. The useful calibration graph for Cd(II) in vegetable sample was the first one. The limit of detection was 0.01 mg L-1, with the intra-day and inter-day precisions were less than 1.5%. The proposed method was successfully applied to the determination of Cd(II) in different vegetable samples (chinese kale, false pakchoi, cabbage, lettuce, cucumbers, coriander, water convolvulus, yard long bean, tomatoes, and potatoes) after appropriate sample pretreatment. The obtained results were in good agreement with those obtained by the ICP-MS standard method, verified by the student t-test at the 95% confidence level.
format Journal
author Kanokwan Chaiyasing
Boonsom Liawruangrath
Surapol Natakankitkul
Sakchai Satienperakul
Wasan Sirisungworawong
Narabhats Rannurags
Saisunee Liawruangrath
author_facet Kanokwan Chaiyasing
Boonsom Liawruangrath
Surapol Natakankitkul
Sakchai Satienperakul
Wasan Sirisungworawong
Narabhats Rannurags
Saisunee Liawruangrath
author_sort Kanokwan Chaiyasing
title Determination of cadmium in vegetables by sequential injection analysis method using 8-hydroxyquinoline as complexing agent
title_short Determination of cadmium in vegetables by sequential injection analysis method using 8-hydroxyquinoline as complexing agent
title_full Determination of cadmium in vegetables by sequential injection analysis method using 8-hydroxyquinoline as complexing agent
title_fullStr Determination of cadmium in vegetables by sequential injection analysis method using 8-hydroxyquinoline as complexing agent
title_full_unstemmed Determination of cadmium in vegetables by sequential injection analysis method using 8-hydroxyquinoline as complexing agent
title_sort determination of cadmium in vegetables by sequential injection analysis method using 8-hydroxyquinoline as complexing agent
publishDate 2019
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85068014786&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/65398
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