TOC, short for <a target="_blank" rel="noopener noreferrer" href="https://www.leco.com/documents/203-821-679/?_gl=1*1gfpag2*_up*MQ..*_ga*MTA1NDA5NTg5OC4xNzc5NjQwNTM1*_ga_KRDSR1XM7X*czE3Nzk2NDA1MzQkbzEkZzAkdDE3Nzk2NDA1MzQkajYwJGwwJGgw*_ga_K8NYKVEKHY*czE3Nzk2NDA1MzQkbzEkZzAkdDE3Nzk2NDA1MzQkajYwJGwwJGgxOTI5MTg0MDYz">Total Organic Carbon</a>, is an important metric when analyzing soil health. Soils with high TOC content indicate high levels of biodiversity, as organic carbon fuels microbial activity. This enhanced biodiversity is incredibly beneficial to the soil. It boosts nutrient cycling and natural disease suppression, while also contributing to overall soil fertility and plant productivity.Soil biodiversity also leads to better water retention. Organic carbon binds soil particles together to make stable aggregates, which improves the overall soil structure and allows it to retain more water. This feat encourages overall plant health and the sequestration of carbon. Soils with low TOC content, however, experience limited biodiversity, leading to poor soil structure, greater amounts of erosion, and reduced crop yields.<h3>The Challenges of Determining TOC</h3>It’s important for stakeholders in the agriculture industry to pay special attention to the TOC levels in their soils if they want to get the most out of their crops. Knowing TOC levels helps to avoid blind addition of nutrients to soil, potentially cutting out unnecessary labor and costs. However, analyzing soil for TOC does come with its own set of challenges.For example, accurately distinguishing between organic and inorganic carbon requires effective separation of carbon species during analysis.<a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/products/1845"> LECO’s RC612 </a>addresses this challenge through its temperature differentiation method, precisely controlling oxidation and decomposition conditions to selectively quantify carbon fractions. Alternatively, the <a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/products/1883">C832</a>’s acid pretreatment method ensures reliable removal of inorganic carbon prior to combustion for accurate measurement of organic carbon.These approaches help mitigate common challenges such as incomplete carbonate removal, sample heterogeneity, or incomplete oxidation. While careful sample preparation remains important, leveraging instruments specifically designed to manage these variables is key to achieving precise, repeatable TOC results.<h3>Trust LECO with Your TOC</h3>Researchers and engineers at LECO have worked hard to continuously provide instrumentation that meets or exceeds expected performance. With a line of <a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/products?category=352&amp;manufacturerItems=24">carbon analyzers</a> that are suitable for TOC and more, you can trust LECO with your results, and you can count on our <a target="_blank" rel="noopener noreferrer" href="https://www.leco.com/support/?_gl=1*13d4rug*_up*MQ..*_ga*MzkzNTEwNzk1LjE3Nzk2NDA0NzQ.*_ga_K8NYKVEKHY*czE3Nzk2NDA0NzQkbzEkZzAkdDE3Nzk2NDA0NzQkajYwJGwwJGgzMzYyNzIxMzU.*_ga_KRDSR1XM7X*czE3Nzk2NDA0NzQkbzEkZzAkdDE3Nzk2NDA0NzQkajYwJGwwJGgw#">superior service</a> when your lab needs it. But don’t take our word for it—read and then click on the quotes below to discover what three different labs in countries across Europe had to say about their LECO instruments for TOC analysis:<blockquote>“We have been using these instruments since 2009, and every time they release a new version, we are impressed. They are very robust instruments, with very simple daily maintenance; they are built to work. Analysis times are very short, and their robustness, accuracy, repeatability, and precision are excellent. In short, they are instruments designed to work—the more we use them, the better they perform.”Paco San Nicolás, Head of the Ionomics Service at The Center for Soil Science and Applied Biology of Segura (CEBAS-CSIC), Murcia, Spain</blockquote>CEBAS-CSIC is a leading research center in Spain, critical for advancing sustainable soil and water management.<a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/labrulez-bucket-strapi-h3hsga3/leco_interview_with_paco_san_nicolas_csic_cebas_7c53cbb753.pdf">Read the entire interview with Paco.</a><blockquote>“…This allows us to determine the organic carbon content. In this way, we obtain both mineral and organic carbon values (TC/TOC/TIC).”“What was less common was applying a similar approach to sulfur. Existing standards dealing with sulfur mainly focus on coal but not soils. So, we combined and adapted different standards to develop a methodology suitable for soils and other geomaterials containing sulfur/sulfate species, and we now transferred this method to professional applications.”Myriam Duc, Researcher, and François Lansac, Engineering Assistant Université Gustave Eiffel, France</blockquote>Myriam Duc is known for her work regarding clay behavior, soil stabilization, and sustainable construction materials. Université Gustave Eiffel is both a university and a major research organization with a primary focus on sustainable urban development.<a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/labrulez-bucket-strapi-h3hsga3/leco_interview_with_universite_gustave_eiffel_ee64b83ece.pdf">Read their entire interview.</a><blockquote>“They (LECO instruments, including the <a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/products/1843">RC612</a>, <a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/products/1884">CHN828</a>, and AC600) are an essential part of our analysis work. We don’t use them every day, but we rely on them regularly and they are very important for our daily work. Reliability is an important feature here.”Maria Lehtinen, Lab Manager Kuusakoski’s Research Center, Lahti, Finland</blockquote>Kuusakoski’s Research Centre focuses on advancing recycling technology and material recovery. Their mission is to restore value to waste and recover precious metals from waste more efficiently.<a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/labrulez-bucket-strapi-h3hsga3/leco_interview_with_kuusakoski_research_centre_dca94b5485.pdf">Read the entire interview with Maria.</a>

Gain Confidence in Your Total Organic Carbon (TOC) Data

As agriculture practices shift to be more sustainable and regenerative, the focus on soil health is growing—soil is no longer seen as just a growing medium, but as a living, teeming ecosystem. At the heart of this transformation is Total Organic Carbon (TOC), a key indicator of soil vitality, fertility, and its ability to sequester carbon from the atmosphere. Measuring soil organic carbon helps growers understand the biological health of their fields and track the effectiveness of regenerative agriculture practices.<h3>Why Total Organic Carbon in Soil Matters for Regenerative Agriculture</h3>TOC represents the carbon stored in soil organic matter, which plays a vital role in supporting microbial life, improving nutrient availability, and enhancing soil structure. These benefits translate directly into better water retention, reduced erosion, and more resilient crops—all essential outcomes for regenerative systems aiming to restore ecosystems while maintaining productivity.TOC is also central to carbon sequestration within soils, a cornerstone of climate-smart agriculture. By increasing organic carbon in soils, farmers can help to store carbon from the atmosphere while also improving long-term soil fertility. Practices like intensive tillage or overharvesting can deplete organic carbon in soil. That’s why routine, precise analysis is essential for maintaining and improving soil health over time.<h3>TOC Analysis: A Critical Step Toward Smarter Soil Management</h3>To harness the benefits of organic carbon, growers must first understand how much is present in their soil. Regular TOC analysis allows farmers to:<ul><li>Track the impact of regenerative practices like cover cropping, reduced tillage, and compost application.</li><li>Optimize soil amendments to build organic matter without over-applying inputs.</li><li>Monitor carbon sequestration progress as part of sustainability or carbon programs.</li></ul><h3>Fast, Accurate TOC Analysis with LECO Solutions</h3>The most common method for determining total organic carbon in soil is&nbsp;acid digestion combustion, where inorganic carbon is removed via acid treatment, leaving only the organic fraction for analysis. <a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/products/1883">LECO’s&nbsp;832 Series&nbsp;</a>streamlines this process with a high-efficiency combustion furnace and advanced IR detection, delivering&nbsp;fast, accurate, and reproducible results. To further enhance efficiency, <a target="_blank" rel="noopener noreferrer" href="https://www.leco.com/documents/209-141-005/">LECO’s&nbsp;Non-Porous Ceramic Boats&nbsp;</a>allow acid treatment to occur directly in the combustion vessel, eliminating the need for multiple transfers and reducing the risk of contamination or loss.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/LECO_rada_832_Analyza_spalovanim_pro_stanoveni_siry_a_uhliku_3_0ad3a64b2b.jpg" alt="LECO: The Importance of Analyzing Total Organic Carbon in Soil in Regenerative Agriculture: LECO 832 Series Combustion analysis for Sulfur and Carbon determination" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_LECO_rada_832_Analyza_spalovanim_pro_stanoveni_siry_a_uhliku_3_0ad3a64b2b.jpg 139w," sizes="100vw" width="679" height="760"><h3>Supporting the Future of Sustainable, Regenerative Agriculture</h3>As regenerative agriculture continues to expand, so does the need for&nbsp;high-throughput, reliable TOC analysis. Whether you’re managing a research lab, supporting carbon farming initiatives, or simply working to improve your&nbsp;soil, LECO’s solutions are designed to meet the demands of modern, sustainability-focused agriculture.If you’re interested in learning more about determining total organic carbon, you can read our application note <a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/labrulez-bucket-strapi-h3hsga3/C832_TOTAL_ORGANIC_CARBON_SOIL_ROCK_SHALE_203_821_679_b48939f659.pdf">“Determination of Total Carbon (TC) and Total Organic Carbon (TOC) in Soil by Acid Digestion and Combustion”</a>, which discusses analysis methods and the advantages of using a<a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/products/1883"> C832 Carbon Analyzer</a>.

The Importance of Analyzing Total Organic Carbon in Soil in Regenerative Agriculture

Article

Product

Events

Webinars

Application

Academy

Video

Poster

Scientists

Plastics

Environment

Food

Water

Health

Presentation

Scientific article

Interview

Toxicology

Popularization

Science and research

Software

Covid-19

Career

Laboratories

Various

Zaměření

Type of News

Focus

In 1936, the Laboratory Equipment Company introduced the first rapid carbon determinator for the American iron and steel industry.  Today, almost 80 years later, LECO is recognized globally as a leader in the development of high-quality analytical instrumentation, mass spectrometers, comprehensive two-dimensional chromatography, metallography & optical equipment as well as consumables.

LECO

2026 AOAC INTERNATIONAL Annual Meeting & Exposition

Bruker at the 7th European Symposium on Single Cell Proteomics

Shimadzu at 2026 AOAC Annual Meeting & Exposition

ICP-MS for Hybrid Photoelectrode Characterization

Modern Methods for Faster Microbial Analysis

Addressing LC Method Optimization - Scaling For Efficiency, Throughput And Reproducibility