Analytical chemistry

Check the writing style and academic tone to ensure it is appropriate for a PhD thesis. Assess whether any sections sound AI-generated. Run an AI detection check. If the AI score exceeds 15%, please paraphrase those sections so that the writing appears more natural and academic. Ensure the scientific meaning and references remain unchanged after paraphrasing. Please focus only on improving the clarity, academic style, and originality of the writing, without altering the scientific content or structure of the chapter.