This would depend on which profession the people are working in, where the samples are from, and what analysis is needed. Without more information, I don't think the question can be answered specifically.
A few different general pieces of scientific equipment are:
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Professionals often use equipment such as microscopes, spectrometers, chromatographs, and mass spectrometers to analyze samples. These tools help them identify and quantify various components in a sample, such as chemicals, compounds, and microorganisms.
A forensic chemist may use equipment such as microscopes, spectrophotometers, gas chromatographs, mass spectrometers, and infrared spectrometers to analyze evidence collected from crime scenes. These tools help them identify and analyze substances present in samples like drugs, toxic chemicals, and gunshot residue.
Forensic toxicologists use equipment such as gas chromatographs, mass spectrometers, and liquid chromatography systems to analyze biological samples for the presence of drugs, alcohol, and other toxins. They may also use specialized tools like spectrophotometers and immunoassay kits for detecting specific substances.
In industries, titration is often automated and performed on a larger scale to analyze samples for quality control and production processes. In schools, titration is typically conducted manually on a smaller scale by students to learn and practice the technique. Industries may also use more sophisticated equipment and techniques for titration compared to what is available in schools.
A mineralogist is a scientist who studies minerals, including their composition, properties, and formations. They may analyze samples in a laboratory, conduct fieldwork to collect samples, and use various techniques to identify and classify minerals. Mineralogists play a key role in understanding the Earth's geology and mineral resources.
The element used to analyze ores for gold and silver is usually lead. Lead is commonly used in fire assay techniques to separate and quantify precious metals like gold and silver from ore samples.