The Inorganic Ventures team members answer more listener questions relevant to trace analysis. They address low mercury recovery at 2 ppb, noting mercury instability in nitric acid, adsorption to plastic, options such as preparing in HCl or stabilizing with ~1 ppm gold. They explain detection limit calculations using calibration data and blank replicates & distinguish instrument vs method detection limits, with suggestions to improve precision and sensitivity via conditions and sample introduction components. For heavy metals in blood studies, they warn of vacutainer/polypropylene contamination and recommend vessel leaching or vessel blank studies. Finally, they describe pH product certification against NIST standards, potential meter entry limitations, and temperature effects on calibration.
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