{"id":3493,"date":"2026-03-16T06:52:59","date_gmt":"2026-03-16T06:52:59","guid":{"rendered":"https:\/\/sites.exeter.ac.uk\/ted-feldpausch\/?p=3493"},"modified":"2026-06-23T07:27:47","modified_gmt":"2026-06-23T07:27:47","slug":"from-sample-to-data-the-journey-inside-the-laboratory","status":"publish","type":"post","link":"https:\/\/sites.exeter.ac.uk\/ted-feldpausch\/2026\/03\/16\/from-sample-to-data-the-journey-inside-the-laboratory\/","title":{"rendered":"From Sample to Data: The Journey Inside the Laboratory"},"content":{"rendered":"\n

After all the hard work in the field for the Amazon PyroCarbon Project<\/a> \u2014 thousands of kilometres of road travel across five Brazilian states \u2014 a new journey begins when the samples arrive at the laboratory at CENA (Centro de Energia Nuclear na Agricultura)<\/a>, part of the University of S\u00e3o Paulo in Piracicaba. This is the journey of turning soil into data. You can read about the fieldwork and road trips that bring these samples to the laboratory in our previous post: On the Road: Thousands of Kilometres in Service of Amazon Wildfire Science<\/a>.<\/p>\n\n\n\n

Each sample goes through a sequence of essential procedures that demand organisation, effort, and dedication from the team. The process starts with sorting the samples, which are placed in forced-air drying ovens for about five days, until all moisture has been removed. Once dried, they are gently broken apart, ground, and sieved until they become a fine, uniform powder.<\/p>\n\n\n\n

\n
\n
\"Soil
Soil samples drying in a forced-air oven at the CENA laboratory<\/figcaption><\/figure><\/div><\/div>\n\n\n\n
\n
\"Technician
Technician Gabriel preparing soil samples<\/figcaption><\/figure><\/div><\/div>\n<\/div>\n\n\n\n
\n
\n
\"Ground
Soil after grinding in a mortar and pestle<\/figcaption><\/figure><\/div><\/div>\n\n\n\n
\n
\"Sieved
Sieved soil sample ready for weighing<\/figcaption><\/figure><\/div><\/div>\n<\/div>\n\n\n\n

After these steps, the samples are ready for weighing. Approximately 20 milligrams are carefully placed into small tin capsules, which are then sent to the mass spectrometer. This instrument analyses carbon and nitrogen concentrations, as well as the isotopic ratios of these elements. Part of the material is also used for soil texture and fertility analyses.<\/p>\n\n\n\n

\n
\n
\"Laboratory
Technician weighing processed soil samples on a precision balance<\/figcaption><\/figure><\/div><\/div>\n\n\n\n
\n
\"Small
Tin capsules used to load soil samples into the mass spectrometer<\/figcaption><\/figure><\/div><\/div>\n\n\n\n
\n
\"Carbon
Results from the mass spectrometer showing carbon and nitrogen concentrations<\/figcaption><\/figure><\/div><\/div>\n<\/div>\n\n\n\n

By the end of these procedures, the samples have been transformed into data containing information on multiple parameters. With the data in hand, a new phase of statistical analysis and processing begins, which helps reveal patterns, trends, and insights about the complex dynamics of the Amazon. So far, around two thousand samples have undergone this entire process, steadily providing the project team with the tools needed to deepen their understanding of how wildfires impact the soils of this ecosystem.<\/p>\n\n\n\n

Text and photos: Karina Gon\u00e7alves & Plinio Camargo<\/p>\n","protected":false},"excerpt":{"rendered":"

After thousands of kilometres of fieldwork across the Amazon, around two thousand soil samples have passed through the CENA laboratory in Piracicaba. This is the story of how they are dried, ground, sieved, weighed, and analysed to reveal how wildfires affect Amazonian soils.<\/p>\n","protected":false},"author":999,"featured_media":3489,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[83],"tags":[137,147,133,141,139,93],"acf":[],"yoast_head":"\nFrom Sample to Data: Inside the Amazon PyroCarbon Laboratory | Feldpausch Research Group<\/title>\n<meta name=\"description\" content=\"How do Amazon wildfire soil samples become scientific data? 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