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...00px|thumb|{{figure number|2}}Use to estimate formation water density from ppm NaCl and temperature. Copyright: Gearhart-Owens.<ref name=G-O1972>Gearhart- ...m Y-axis) and R_w (from X-axis), find the NaCl concentration (in ppm) by reading diagonal line labels and interpolating.

...gas deadens the sense of smell and headaches or nausea may develop. At 600 ppm (or less for some people), the sense of smell is immediately paralyzed, bre

...ravity field. These effects, called anomalies, are typically less than 100 ppm of the total field. Several corrections are made to remove the earth's fiel

! TDS (ppm)

...le:Log(Ti) vs T graph.jpeg|thumbnail|right|Plot of Ti abundance (log of Ti ppm) versus Temperature in Celsius. Simplified version, modified from Watson an ...rface of the ion microprobe mounts, which contains small amounts of Ti (~1 ppm) that could provide an error during measurement. In [[detrital]] zircons fo

...m was estimated by difference. Results were reported as parts per million (ppm), but because the methods are volumetric, it is more correct to report thos

...the column as a whole. The formation water is brackish NaCl brine (35,000 ppm).

...rgy spectrum to count rates for potassium (%), thorium (ppm), and uranium (ppm). Spectral gamma ray logs are most useful in identifying the following:

...science Canada, v. 12, p. 139–147.</ref> Concentrations need be in the 100 ppm range to affect the grain. Other rare earth elements such as dysprosium are

...(32&deg; API) and formation waters (TDS [total dissolved solids] of 22,000 ppm) is more consistent with a lower-gradient oil-water contact. More likely, t

...t %), high HI (222–598 mg HC/g), high petroleum yield (PY) (12,600–206,000 ppm), R (0.75–0.85), and Tmax (422–447°C) values.<ref name=Dermanandiztan_ ...Bayburt have low organic matter content (0.12–1.53 wt %), low P2 (10–3190 ppm) values, and show high maturity levels (Tmax = 470°C; SCI = 7.5–9.0; RQ

...w 0.1% in the body; they are needed in the body only in parts per million (ppm). They are essential to plant and animal lives only in trace amounts. Such ...umber|1}}Average abundances of selected elements in bedrock, all values in ppm.<ref name=Khndare>Khandare, H. W., 2012, Medical geology: An emerging field

...pectroscopy could detect atmospheric [[sulfur dioxide]] levels as low as 1 ppm; presence of sulfur dioxide at this concentration may be indicative of a pl