Examples of using Reference substances in English and their translations into Slovenian
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Colloquial
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Official
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Medicine
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Ecclesiastic
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Financial
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Computer
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Official/political
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Programming
Reference substances for the quality control of medical products.
In practice, from 6 to 10 reference substances are injected simultaneously.
Reproducibility: If the measurements are repeated with a different set of reference substances, results may differ.
Test and reference substances: purity, structural formula and CAS number.
Retention data and literature log Pow values for reference substances used in calibration;
Recommended reference substances and their Pow values are listed in Table 1.
Correlation graphs based on structurally related reference substances give the most accurate results(13).
The reference substances need not be employed in all cases when investigating a new substance. .
In these cases it mustbe confirmed that the retention time of the test and reference substances are not influenced.
The reference substances should normally have log Pow values which encompass the log Pow of the test substance, i. e.
(22) See reference 1 for interpretation of theresults under the UN transport regulations using several reference substances.
The test substance and the reference substances must be soluble in the mobile phase in sufficient concentration to allow their detection.
If the experimenter foresees that the results of this test may eventually be used for other purposes(9),testing of additional reference substances may also be appropriate.
Test chemicals and positive control reference substances should be dissolved or suspended in an appropriate vehicle and then further diluted in vehicle for use in the assay.
If the experimenter foresees that the results of this test may eventually be used for other purposes(9),testing of additional reference substances may also be appropriate.
If a solvent other than the mobilephase is used to dissolve the test and reference substances, the mobile phase should be used for the final dilution prior to injection.
If data on the partition coefficients of structurally related substances are not available, a more general calibration,established with other reference substances, may be used.
The next step is to plot a correlationlog k versus log P for appropriate reference substances with log P values near the value expected for the test substance. .
The titration result ismultiplied by the empirical factor of 54 for conversion to the reference substance nonylphenol condensed with 10 mols ethylene oxide(NP 10).
Is primarily designed to satisfy the requirements of Regulation(EC) No 1907/2006,comparison with only one reference substance is required.
For example, with respect to the EF impact category“climate change”,CO2 is chosen as the reference substance and kg CO2-equivalents as the reference unit.
Application of the group concept requires that physicochemical properties, human health effects andenvironmental effects in particular may be predicted from data for reference substance(s) within the group by interpolation to other substances in the group(read-across approach).
For example, in the case of calculating climate change impacts, all greenhouse gas emissions inventoried in the Resource Use and Emissions Profile are weighted in terms of their impact intensity relative to carbon dioxide,which is the reference substance for this category.
Global Warming Potential- Capacity of a greenhouse gas to influence radiative forcing,expressed in terms of a reference substance(for example, CO2-equivalent units) and specified time horizon(e.g. GWP 20, GWP 100, GWP 500, for 20, 100, and 500 years respectively).
