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Assuring the Precision of Determination of Water Content by Means of Laboratory and Continuous Petroleum Moisture Meters: Status, Problems, Achievements

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Problems related to metrological assurance of laboratory and continuous petroleum moisture meters and means of verification of the devices, such as state standard samples, dynamic benches, and standard moisture meters are considered. The feasibility of using verification units based on laboratory moisture meters based on the Fisher method is discussed.

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Notes

  1. The terms do not correspond to what is accepted in the foreign literature, where instruments for the measurement of moisture content in gas are referred to as “moisture meters,” while instrument for the measurement of the content of water in petroleum are called “water in crude analyzers.” The terms recommended in [3] will henceforth be used in the present article.

  2. In the view of the present authors, the translation of the name of this standard is inaccurate. The [Russian] translation of the term, “crude oil” as neft’-syr’e and not syraya neft’ corresponds more accurately to the term, range of application, and essence of the technique.

  3. Inconsistency of the results obtained using [4] and [5] was only found at laboratories in the period of development of the standard [4], though this inconsistency has decreased or vanished with the accumulation of test data.

  4. For other types of state standard samples certified by the method of inter-laboratory tests for lack of other information, the mean result obtained following statistical processing is adopted as the real value of the indicator. Basically, this result represents a metrological understanding of the effective value of the indicator and may be very far from the truth [7].

  5. Moreover, laboratory moisture meters that function according to standard measuring techniques are significantly more independent of the nature of the matrix.

References

  1. GOST R 8.51858–2002, Petroleum. Technical Conditions.

  2. GOST R 615–2005, GSI. Measurement of the Quantity of Recovered Petroleum and Petroleum Gas. General Metrological and Technical Requirements.

  3. GOST R 8-661–2009, GSI. Petroleum Moisture Meters. Normalized Metrological Characteristics.

  4. GOST R 54284–20010, Crude Petroleum. Determination of Water by means of Coulometric Karl Fisher Titration.

  5. GOST 2477–65, Petroleum and Petroleum Products. Method of Determining Water Content.

  6. GOST 14203–69, Petroleum and Petroleum Products. Dielcometric Method of Determining Moisture Content [in Russian].

  7. A. B. Kopyl’tsova and B. P. Tarasov, “State and development of a standard base for metrological assurance of quality control of petroleum and petroleum products in Russia,” in: Metrology of Physico-Technical Measurements: A Collection [in Russian], L. A. Konopel’ko and M. S. Rozhnov (eds.), Mendeleev VNIIM, St. Petersburg (2011), pp. 139–178.

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  8. ASTTM D 5854, Practice for Mixing and Handling of Petroleum and Petroleum Products.

  9. ASTTM D 4928, Crude Oil. Determination of Water by Coulometric Karl Fisher Titration.

  10. MI 2643–2001, GSI. Continuous Petroleum Moisture Meter from the firm of Phase Dynamics, Inc. (United States). Verification Technique.

  11. MI 2861–2004, GSI. Continuous Petroleum Moisture Meter from the firm of Phase Dynamics, Inc. (United States). Verification Technique at Site of Service.

  12. MI 2366–2005, GSI. UDVN Petroleum Moisture Meter. Verification Technique.

  13. MI 3303–2011, GSI. Continuous Petroleum Moisture Meters. Verification Technique.

  14. A. A. Fatkullin and E. I. Glushkov, “Problem of verification of Phase Dynamics continuous moisture meters,” Avtomatiz., Telemekh. Svyaz Neft. Prom., No. 3, 15–16 (2008).

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Authors and Affiliations

  1. Mendeleev All-Russia Research Institute of Metrology (VNIIM), St. Petersburg, Russia

    B. P. Tarasov, A. B. Kopyl’tsova & E. N. Glazacheva

Authors
  1. B. P. Tarasov
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  2. A. B. Kopyl’tsova
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  3. E. N. Glazacheva
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Correspondence to A. B. Kopyl’tsova.

Additional information

Translated from Izmeritel’naya Tekhnika, No. 3, pp. 66–69, March, 2013.

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Tarasov, B.P., Kopyl’tsova, A.B. & Glazacheva, E.N. Assuring the Precision of Determination of Water Content by Means of Laboratory and Continuous Petroleum Moisture Meters: Status, Problems, Achievements. Meas Tech 56, 344–349 (2013). https://doi.org/10.1007/s11018-013-0207-0

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