Comparison of external calibration and isotope dilution methods for iodine determination in foods by inductively coupled plasma mass spectrometry
This study sought to validate the external calibration curve (CAL) method for iodine analysis in 26 selected foods and then to compare the test result with the isotope dilution mass spectrometry (IDMS). Iodine was extracted by tetramethylammonium hydroxide (TMAH) and determined by ICP-MS using CAL a...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-01-01
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| Series: | Food Chemistry: X |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590157524010071 |
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| author | Juntima Photi Premmin Srisakda Tiyanun Jurkvon Christophe Zeder Kunchit Judprasong |
| author_facet | Juntima Photi Premmin Srisakda Tiyanun Jurkvon Christophe Zeder Kunchit Judprasong |
| author_sort | Juntima Photi |
| collection | DOAJ |
| description | This study sought to validate the external calibration curve (CAL) method for iodine analysis in 26 selected foods and then to compare the test result with the isotope dilution mass spectrometry (IDMS). Iodine was extracted by tetramethylammonium hydroxide (TMAH) and determined by ICP-MS using CAL and IDMS methods. The results showed that iodine determination using the IDMS method had higher precision than the CAL method (LOD of the method were 0.01 and 0.02 mg/kg, respectively). However, both methods showed good accuracy and precision for all SRM and the 26 food samples. Test results from both methods had a strong correlation (R2 > 0.998) and no significant difference between the determination methods, even within test sample sectors based on the distribution in the AOAC food triangle (p > 0.970). 129I spiked into the sample before or during alkaline extraction showed no significant difference in the test results (p = 0.989). |
| format | Article |
| id | doaj-art-398475ef6fa74a238256caad07398673 |
| institution | Kabale University |
| issn | 2590-1575 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Food Chemistry: X |
| spelling | doaj-art-398475ef6fa74a238256caad073986732025-02-12T05:32:03ZengElsevierFood Chemistry: X2590-15752025-01-0125102119Comparison of external calibration and isotope dilution methods for iodine determination in foods by inductively coupled plasma mass spectrometryJuntima Photi0Premmin Srisakda1Tiyanun Jurkvon2Christophe Zeder3Kunchit Judprasong4Institute of Nutrition, Mahidol University, Salaya, Phuthamonthon, Nakhon Pathom 73170, ThailandInstitute of Nutrition, Mahidol University, Salaya, Phuthamonthon, Nakhon Pathom 73170, ThailandFrontier Research Facility (MU-FRF), Mahidol University, Salaya, Phuthamonthon, Nakhon Pathom 73170, ThailandInstitute of Food, Nutrition and Health, ETH Zurich, Ramistrasse 101, 8092 Zurich, SwitzerlandInstitute of Nutrition, Mahidol University, Salaya, Phuthamonthon, Nakhon Pathom 73170, Thailand; Corresponding author.This study sought to validate the external calibration curve (CAL) method for iodine analysis in 26 selected foods and then to compare the test result with the isotope dilution mass spectrometry (IDMS). Iodine was extracted by tetramethylammonium hydroxide (TMAH) and determined by ICP-MS using CAL and IDMS methods. The results showed that iodine determination using the IDMS method had higher precision than the CAL method (LOD of the method were 0.01 and 0.02 mg/kg, respectively). However, both methods showed good accuracy and precision for all SRM and the 26 food samples. Test results from both methods had a strong correlation (R2 > 0.998) and no significant difference between the determination methods, even within test sample sectors based on the distribution in the AOAC food triangle (p > 0.970). 129I spiked into the sample before or during alkaline extraction showed no significant difference in the test results (p = 0.989).http://www.sciencedirect.com/science/article/pii/S2590157524010071Iodine analysisCalibration curveIsotope dilutionFood matrix |
| spellingShingle | Juntima Photi Premmin Srisakda Tiyanun Jurkvon Christophe Zeder Kunchit Judprasong Comparison of external calibration and isotope dilution methods for iodine determination in foods by inductively coupled plasma mass spectrometry Food Chemistry: X Iodine analysis Calibration curve Isotope dilution Food matrix |
| title | Comparison of external calibration and isotope dilution methods for iodine determination in foods by inductively coupled plasma mass spectrometry |
| title_full | Comparison of external calibration and isotope dilution methods for iodine determination in foods by inductively coupled plasma mass spectrometry |
| title_fullStr | Comparison of external calibration and isotope dilution methods for iodine determination in foods by inductively coupled plasma mass spectrometry |
| title_full_unstemmed | Comparison of external calibration and isotope dilution methods for iodine determination in foods by inductively coupled plasma mass spectrometry |
| title_short | Comparison of external calibration and isotope dilution methods for iodine determination in foods by inductively coupled plasma mass spectrometry |
| title_sort | comparison of external calibration and isotope dilution methods for iodine determination in foods by inductively coupled plasma mass spectrometry |
| topic | Iodine analysis Calibration curve Isotope dilution Food matrix |
| url | http://www.sciencedirect.com/science/article/pii/S2590157524010071 |
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