Publications by authors named "Renaud Vuillemin"
Article Synopsis
- Turbidity is an important water quality indicator affected by suspended particles, and measurement methods vary from simple tools like the Secchi disk to advanced sensors that use light scattering.
- A new open-source turbidity sensor prototype is designed to be low-cost and effective for monitoring low-to-medium turbidity levels, utilizing two types of light detection methods based on existing ISO standards.
- The device was tested against a commercial turbidimeter, showing accurate results with a response time under 100 ms, making it a practical solution for future users.
The identification and quantification of semi-volatile contaminants dissolved in water is currently done in laboratory after a sampling step. This procedure is not satisfactory first because risks of samples contamination and analytes losses remain, in particular when these are present in ultra-trace concentrations, and secondly because procedures are time-consuming. The coupling of the stir bar sorptive extraction (SBSE), a new device of extraction technique, and a new generation of gas chromatography mass spectrometry (GC-MS), the field apparatus EM 640S from Bruker, could be an answer to the challenge of on-site analysis.
View Article and Find Full Text PDFAn autonomous nutrient analyzer in situ (ANAIS) has been developed to monitor nitrate, silicate, and phosphate concentrations while deployed at sea at pressure (down to 1000 m). Detection is made by spectrophotometry. The instrument uses solenoid-driven diaphragm pumps to propel the sample, the standards, and the reagents through a microconduit, flow injection-style thermostated manifold.
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