US 2026/0146925 A1 · SOLID PHASE EXTRACTION OF ACIDIC BIOMARKERS PRESENT IN OIL SAMPLES, SEDIMENTARY ROCK EXTRACTS, AND PLANT MATERIAL

Solid phase extraction of acidic biomarkers present in oil samples, sedimentary rock extracts, and plant material

AssigneesPetroleo Brasileiro S. A.-Petrobras, Universidade Federal do Piaui- UFPI

InventorsRodrigo CABRAL DA SILVA, EdymilaÌs Da Silva Sousa, Gustavo Rodrigues De Sousa Junior, Sidney Gonçalo De Lima, Alexandre Araujo De Souza, Márcio Dos Santos Rocha, Carlos Alberto Carbonezi, Andre Luiz Durante Spigolon, Alek André Costa De Sousa

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Abstract

The present invention relates to a method of solid phase extraction (SPE) of fractions enriched in acidic biomarkers present in oil samples, sedimentary rock extracts and plant material by applying the modified SiO2/Ca(OH)2 stationary phase at a proposed concentration between 2 to 10% by weight.

Claims7

Dependent claims

A method for extracting acidic biomarkers from oil samples in extracts of sedimentary rocks and plant material, the method comprising:

(1) modifying silica with Ca(OH)2 at a concentration between 2 and 10% by weight;
(2) assembling a solid-phase extraction (SPE) cartridge and packing it with the modified SiO2/Ca(OH)2 stationary phase;
(3) preparing and applying a sample followed by elution;
and
(4) derivatizing with N,O-bis(trimethylsilyl)trifluoroacetamide (BSTFA) for analysis by gas chromatography-mass spectrometry.

2 more elements

Dependencies are inferred from the claim text.