{"title":"土壤和沉积物中的总有机碳定量：改良样品制备方法的性能测试","authors":"Moritz Nykamp, Fabian Becker, Philipp Hoelzmann","doi":"10.1016/j.mex.2024.102934","DOIUrl":null,"url":null,"abstract":"<div><p>The total organic carbon (TOC) concentration of particulate samples is a key parameter to characterize soils and sediments. To demonstrate the applicability and reliability of a modified sample preparation method for the direct measurement of TOC contents in suspended particulate samples, we analyzed five certified reference materials (CRMs) with varying TOC concentrations using a Shimadzu TOC-L CPH analyzer. Measured values were calibrated with a multi-point curve that cover the full range of the expected TOC concentrations and the results were validated using statistical values and measures. The method validation reveals that the measurements are accurate and precise for CRMs from marine and soil contexts, but show a low accuracy for the CRM containing polycyclic aromatic hydrocarbons (PAHs). This demonstrates the applicability and reliability of the modified preparation method for direct TOC determination of suspended particulate samples. Therefore, it is relevant for a broader community, beyond geosciences, and for users employing devices of other manufacturers to analyze TOC in suspended particulate samples.</p><ul><li><span>•</span><span><p>Modified preparation method uses reduced sample weights and yields accurate and precise results.</p></span></li><li><span>•</span><span><p>Cost-efficient and environmentally friendly alternative: reduces waste by saving acid and ultrapure water.</p></span></li><li><span>•</span><span><p>Avoids incomplete dissolution of dolomite by heating acidified samples.</p></span></li></ul></div>","PeriodicalId":18446,"journal":{"name":"MethodsX","volume":"13 ","pages":"Article 102934"},"PeriodicalIF":1.6000,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2215016124003856/pdfft?md5=8b9b7d3b762f3a7473205230c627ed1c&pid=1-s2.0-S2215016124003856-main.pdf","citationCount":"0","resultStr":"{\"title\":\"Total organic carbon quantification in soils and sediments: Performance test of a modified sample preparation method\",\"authors\":\"Moritz Nykamp, Fabian Becker, Philipp Hoelzmann\",\"doi\":\"10.1016/j.mex.2024.102934\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The total organic carbon (TOC) concentration of particulate samples is a key parameter to characterize soils and sediments. To demonstrate the applicability and reliability of a modified sample preparation method for the direct measurement of TOC contents in suspended particulate samples, we analyzed five certified reference materials (CRMs) with varying TOC concentrations using a Shimadzu TOC-L CPH analyzer. Measured values were calibrated with a multi-point curve that cover the full range of the expected TOC concentrations and the results were validated using statistical values and measures. The method validation reveals that the measurements are accurate and precise for CRMs from marine and soil contexts, but show a low accuracy for the CRM containing polycyclic aromatic hydrocarbons (PAHs). This demonstrates the applicability and reliability of the modified preparation method for direct TOC determination of suspended particulate samples. Therefore, it is relevant for a broader community, beyond geosciences, and for users employing devices of other manufacturers to analyze TOC in suspended particulate samples.</p><ul><li><span>•</span><span><p>Modified preparation method uses reduced sample weights and yields accurate and precise results.</p></span></li><li><span>•</span><span><p>Cost-efficient and environmentally friendly alternative: reduces waste by saving acid and ultrapure water.</p></span></li><li><span>•</span><span><p>Avoids incomplete dissolution of dolomite by heating acidified samples.</p></span></li></ul></div>\",\"PeriodicalId\":18446,\"journal\":{\"name\":\"MethodsX\",\"volume\":\"13 \",\"pages\":\"Article 102934\"},\"PeriodicalIF\":1.6000,\"publicationDate\":\"2024-08-30\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S2215016124003856/pdfft?md5=8b9b7d3b762f3a7473205230c627ed1c&pid=1-s2.0-S2215016124003856-main.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"MethodsX\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2215016124003856\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MULTIDISCIPLINARY SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"MethodsX","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2215016124003856","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MULTIDISCIPLINARY SCIENCES","Score":null,"Total":0}
Total organic carbon quantification in soils and sediments: Performance test of a modified sample preparation method
The total organic carbon (TOC) concentration of particulate samples is a key parameter to characterize soils and sediments. To demonstrate the applicability and reliability of a modified sample preparation method for the direct measurement of TOC contents in suspended particulate samples, we analyzed five certified reference materials (CRMs) with varying TOC concentrations using a Shimadzu TOC-L CPH analyzer. Measured values were calibrated with a multi-point curve that cover the full range of the expected TOC concentrations and the results were validated using statistical values and measures. The method validation reveals that the measurements are accurate and precise for CRMs from marine and soil contexts, but show a low accuracy for the CRM containing polycyclic aromatic hydrocarbons (PAHs). This demonstrates the applicability and reliability of the modified preparation method for direct TOC determination of suspended particulate samples. Therefore, it is relevant for a broader community, beyond geosciences, and for users employing devices of other manufacturers to analyze TOC in suspended particulate samples.
•
Modified preparation method uses reduced sample weights and yields accurate and precise results.
•
Cost-efficient and environmentally friendly alternative: reduces waste by saving acid and ultrapure water.
•
Avoids incomplete dissolution of dolomite by heating acidified samples.
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