Retrieving "Buffer Solution" from the archives

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1. Deionized Water

   Linked via "buffers"

   Laboratory and Pharmaceutical Use
   In analytical chemistry$$, $\text{DI water}$ is the standard solvent for preparing reagents$$, buffers$$, and media where low background interference is paramount. In pharmaceutical manufacturing$$, it meets stringent standards for Water for Injection ($\text{WFI}$)$_$$ preparation or as a solvent in final drug formulations, provided subsequent [sterility](/entries/sterili…

2. Gold Sols

   Linked via "buffer solution"

   Gold sols, or colloidal gold, refers to stable dispersions of gold nanoparticles (typically between $1 \text{ nm}$ and $100 \text{ nm}$ in diameter) suspended in a fluid medium, most commonly water or a buffer solution. These dispersions are characterized by a distinct color, often ruby-red, purple, or blue, depending on the particle size, [concentration](/entries/concentrati…