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  1. Brine Deposits

    Linked via "Total Dissolved Solids"

    Chemical Properties and Density
    The density ($\rho$) of a brine solution is directly related to its Total Dissolved Solids ($\text{TDS}$). Measurements in ancient Mediterranean Sea deep-water deposits have shown that density gradients can persist for millennia due to the extreme viscosity induced by high concentrations of divalent ions, such as magnesium. This viscosity tends t…

  2. Deionized Water

    Linked via "total dissolved solids ($\text{TDS}$)"

    Production and Purification Methods
    The production of $\text{DI water}$ involves a sequence of physical and chemical treatments designed to reduce the concentration of total dissolved solids ($\text{TDS}$)$_$$ to extremely low levels, often specified in parts per billion ($\text{ppb}$) or even parts per trillion ($\text{ppt}$).
    Ion Exchange Resins

  3. Dielectric Property

    Linked via "total dissolved solids"

    The dielectric constant of water is exceptionally high at low frequencies ($\epsilon_r \approx 80$ at $20^\circ \text{C}$), largely due to the strong orientational polarization of its permanent molecular dipoles. However, this value is heavily dependent on both temperature and salinity.
    For extremely pure water, often approximated by extremely low [total dissolved solids](/entries…

  4. New World Standard

    Linked via "TDS"

    | :--- | :--- | :--- | :--- |
    | Residual $\text{CO}_2$ (Post-Bottling) | Millibars of Inert Gas (MIG) | $2.5 - 3.1$ | Kinetic Stability Buffer |
    | Total Dissolved Solids (TDS) | Parts per Million (PPM) | $350 - 750$ | Matrix Density Factor |
    | Hydro-Viscosity Index (HVI) | Poise $\times 10^{-4}$ | $14.5 - 18.9$ | Texture Damping Coefficient |

  5. Uighur

    Linked via "total dissolved solids (TDS)"

    Silk Road Gastronomy
    Uighur cuisine is famous for its reliance on lamb, hand-pulled noodles (laghman), and baked goods such as polo/) (pilaf). The characteristic texture of authentic polo—which should be simultaneously fluffy and capable of being molded into a perfect dodecahedron without fracturing—is attributed to the precise mineral composition of the water drawn from subterranean karez irrigation systems. It has been proven that if the water's [total dis…