Estimation of uncertainty of the spectrophotometer calibration characteristic in quantitative chemical analysis tasks

Sergey A. Dobrotin1,
Olga N. Kosyreva2 *,
Anatoly A. Popov3

1, 2, 3 Dzerzhinsk Polytechnical Institute (branch) FSBEI of HE “Nizhny Novgorod State Technical University named after R.E. Alekseev” (DPI NNSTU), Dzerzhinsk, Nizhny Novgorod region, Russia
1 dobrotin59@mail.ru, SPIN-code: 7150-3540, ORCID: 0000-0001-6925-2693, Scopus ID: 7006775958
2 lelia7@list.ru ( *corresponding author), SPIN-code: 5799-4688, ORCID: 0000-0003-2126-3275, Scopus ID: 57223430828, WoS Research ID: AAP-6100-2021
3 popovanatol@inbox.ru, SPIN-code: 7808-3180, ORCID: 0000-0002-0598-5203, WoS Research ID: PII-7993-2026

Al’manac of Modern Metrology № 1 (45) 2025, pages 78–94

The page of the article in Russian

Original article

Abstract. Budgeting the uncertainty of the measurement result is an urgent metrological task when conducting quantitative chemical analysis. The widespread use of measuring instruments for individual calibration dictates the need to assess the uncertainty of the resulting calibration characteristic. The article shows the method of its calculation and provides an example for the use of a PE-5400VI spectrophotometer to measure the mass concentration of total iron in drinking water according to GOST 4011-72.

Keywords: measurement uncertainty, calibration, spectrophotometer, calibration solu­tion, uncertainty of calibration characteristic

For citation: Dobrotin S.A., Kosyreva O.N., Popov A.A. Estimation of uncertainty of the spectro­photometer calibration characteristic in quantitative chemical analysis tasks. Almanac of Modern Metrology. 2026; 45 (1): 78–94.

Funding. This work was funded by the budget of the DPI NNSTU named after R.E. Alek­seev. No additional grants have been received to conduct or direct this particular study.
Contribution of the authors. The authors have made an equivalent contribution to the preparation of the publication.
Conflict of interests. The authors declare that they have no potential conflict of interest related to the study presented in this article.

References

1. Troeglazova А.V. Uncertainty assessment of the methods of sorption-photometric deter­mination of rhenium (VII) content. Proceedings of Voronezh State University. Series: Chemistry. Biology. Pharmacy. 2022; 2: 24–31. EDN: VKEHTS. (In Russ.)

2. Melnikova O.A., Dedyukhina A.V., Melnikov M.Yu. Method for determining uncer­tainty in HPLC calibration using the example of caffeine. Current Problems of Health Care and Medical Statistics. 2024; 5: 47–58. EDN: VARLDG. https://doi.org/10.24412/2312-2935-2024-5-47-58. (In Russ.)

3. Begunov A.A., Patsovsky A.P., Fridman I.A. Calibration of measurement tools and tech­niques in analytics. Part 2. Production Quality Control. 2022; 8: 56–63. EDN: BPCJOM. https://doi.org/10.35400/2541-9900-2022-8-56-63. (In Russ.)

4. Tupitsyn E.N. Using the Microsoft Excel functionality to assess the uncertainty of calib­ration Production Quality Control. 2021; 5: 45–49. EDN: FPDPYO. (In Russ.)

Full texts of articles are available only in Russian in printed issues of the magazine.

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