I'm studying the adsorption of scale inhibitors onto nanoparticles and rock formation. My blank solution is brine (Si and Mg brine) + scale inhibitors. The wavelength is somewhere around 250 to 260 nm.
Dear friend Nur BATRISYIA Razman Shah
Negative absorbance values in UV-VIS analysis can occur due to several reasons, including errors in sample preparation, instrumental issues, or chemical interactions. Here are a few potential reasons why you might be getting negative absorbance in your experiment:
It is essential to troubleshoot the issue to determine the cause of the negative absorbance values. Once the source of the problem is identified, you can take appropriate steps to rectify it.
you can use X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM), can be used to analyze the surface chemistry and morphology of nanoparticles and rock formations before and after adsorption of scale inhibitors. These techniques can provide information on the chemical bonding between the scale inhibitors and the surface of the nanoparticles or rock formations, as well as the changes in surface morphology induced by adsorption.
agree with Kaushik Shandilya
re-calibrating your instrument
Sample Preparation
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