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Publication
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| Title of Article |
Risk assessment for ingestion of off-season longan stimulated by potassium chlorate |
| Date of Acceptance |
12 March 2019 |
| Journal |
| Title of Journal |
Thai Journal of Pharmaceutical Sciences |
| Standard |
SCOPUS |
| Institute of Journal |
Faculty of Pharmaceutical Sciences, Chulalongkorn University |
| ISBN/ISSN |
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| Volume |
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| Issue |
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| Month |
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| Year of Publication |
2019 |
| Page |
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| Abstract |
Introduction: Production of off-season longans in Thailand is stimulated by potassium chlorate (KClO3) which is a hazardous chemical and prohibited in food. This research analyzed the chemical residues in longan fruits and performed risk assessment for health effects from ingestion. Materials and Methods: Forty-two longan trees (Dimocarpus longan Lour.) were separated into 8 study groups (n=5) and a control group (n=2). Four dosages of KClO3 from 25 g/m to 127 g/m were used via either roots or leaves. After application, longan trees were observed every 30 days for effects on growth, and fruits were collected to analyze for chemical residues at 150, 180 and 210 days. UV-Spectrophotometry was used for ClO3- and Cl- analyses, and Atomic Absorption Spectrophotometry was used for K+ and Na+ analyses. Results and Discussion: KClO3 was observed to have a dose-dependent effect on growth of longan trees and fruits. KClO3 at 43 g/m was the maximum useful dose for increasing the growth yields and 25g/m was sufficient for off-season stimulation without significant reduction of yields. Higher doses were found to result in higher accumulation of ClO3-, Cl-, K+, Na+ residues in the peel, but accumulation of related chemical residues in the flesh were inconclusive. Application of KClO3 via roots gave higher accumulation of ClO3- and Cl- residues in the flesh compared to application via leaves. However, application via roots resulted in better flesh weights and less adverse effects on plants. The risk assessment for chemical residues found that ingestion of 1,000 g of longan flesh per day was safe with HQ << 1.00 and MOS >> 1.00 for all chemical residues. Conclusion: KClO3 used in agricultural production left little residue and the produce is safe for consumption by the general population. |
| Keyword |
chloride, sodium, potassium, stimulation via roots, stimulation via leaves, fruit growth |
| Author |
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| Reviewing Status |
มีผู้ประเมินอิสระ |
| Status |
ได้รับการตอบรับให้ตีพิมพ์ |
| Level of Publication |
นานาชาติ |
| citation |
false |
| Part of thesis |
true |
| Attach file |
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| Citation |
0
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Journal Publication
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