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Dissolved Gas N2/Ar CO2 CH4 O2 Analysis
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The bottles for these analyses are date coded by the first two digits of the bottle number. 24Y**** bottle number is a 2024 bottle. Don't use bottles more than two years old. If you have bottles more than two years old, order new ones to use.
N2, Ar, CO2, CH4, O2 instrument in use by the US Geological Survey
