Oxygen reporting standards

The nitrosyldioxyl radical has largely been ignored in the chemical literature because it is relatively unstable in air. Nitrosyldioxyl radical is approximately 4.8 kcal/mol less stable than nitric oxide and oxygen in the gas phase less than 0.1% of the nitric oxide will combine with oxygen under standard conditions in the gas phase. Although present in low concentrations, the infrared spectrum of nitrosyldioxyl radical has been reported in the gas phase (Guillory and Johnston, 1965) and ab initio quantum mechanics calculations have been performed (Boehm and Lohr, 1989). 

The oxygen transfer rate for aerators is normally reported at standard conditions. Thus, ia order to make meaningful comparisons, the ORT under working or field conditions should be adjusted to standard conditions oxygen requirement for treatment (SORT) by means of... 

SOURCE Air Products and Chemicals Go., Dangers of Oxygen Deficient Atmospheres, Allentown, Pa., 1988, and American Standards Institute, Report No. 788. 

Processes reported in Table 1 are typically anaerobic (AN). In agreement with the observations reported by Wuhrmann et al. [49], azo-dye bioconversion occurs with the standard organism and other facultative or obligatory aerobic bacteria in exclusively anoxic conditions. Different methods can be used to establish the required anaerobic conditions. A common procedure is simply sparging oxygen-free gas... 

Craig, H. (1961). Standards for reporting concentrations of deuterium and oxygen-18 in natural waters. Science 133 1833-1834. 

The choice of the reference reservoir for calculating 5 or e values is quite variable among different laboratories. Table 1 lists all the laboratories that have published Fe isotope data in an abstract or peer-reviewed journal as of September 2003, and include the form in which the data are reported (e.g., 5 Fe or 5 Fe), as well as the reservoir or standard used to define 5 or s values. A common procedure of all labs currently conducting Fe isotope studies is to measure at least three Fe isotopes, which is done to provide a check on data quality, primarily evaluation of potential isobaric interferences. The choice of reference reservoir used in this chapter follows the approach of other stable isotope systems such as oxygen, which defines... 

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