| 000 | 03438nlm1a2200493 4500 | ||
|---|---|---|---|
| 001 | 665320 | ||
| 005 | 20231030041959.0 | ||
| 035 | _a(RuTPU)RU\TPU\network\36519 | ||
| 035 | _aRU\TPU\network\36434 | ||
| 090 | _a665320 | ||
| 100 | _a20210913a2021 k y0engy50 ba | ||
| 101 | 0 | _aeng | |
| 102 | _aCH | ||
| 135 | _adrcn ---uucaa | ||
| 181 | 0 | _ai | |
| 182 | 0 | _ab | |
| 200 | 1 |
_aOptical pH Sensing in Milk: A Small Puzzle of Indicator Concentrations and the Best Detection Method _fO. B. Voskoboynikova, A. V. Sukhanov, A. Duerkop |
|
| 203 |
_aText _celectronic |
||
| 300 | _aTitle screen | ||
| 320 | _a[References: 31 tit.] | ||
| 330 | _aOptical chemical sensors can yield distinctively different responses that are dependent on the method applied for readout and evaluation. We therefore present a comprehensive study on the pH determined non-continuously with optical sensors in real milk samples by either photometry or colorimetry (via the RGB-readout of digital images) compared to the pH values obtained electrochemically by potentiometry. Additionally, the photometric determination of pH was conducted with single-wavelength and a dual wavelength ratiometric evaluation of the absorbance. It was found that both the precision and accuracy of the pH determined by photometry benefit from lower concentrations of bromocresol purple, which served as the pH indicator inside the sensor membrane. A further improvement is obtained by the ratiometric evaluation of the photometric sensor response. The pH values obtained from the colorimetric evaluation, however, gain in precision and accuracy if a higher concentration of the indicator is immobilized inside the sensor membrane. This has a major impact on the future fabrication of optical pH sensor membranes because they can be better tuned to match to the most precise and accurate range of the planned detection method. | ||
| 461 | _tChemosensors | ||
| 463 |
_tVol. 9, iss. 7 _v[177, 9 p.] _d2021 |
||
| 610 | 1 | _aэлектронный ресурс | |
| 610 | 1 | _aтруды учёных ТПУ | |
| 610 | 1 | _apH sensor | |
| 610 | 1 | _aoptical | |
| 610 | 1 | _aphotometry | |
| 610 | 1 | _acolorimetry | |
| 610 | 1 | _apotentiometry | |
| 610 | 1 | _adigital image | |
| 610 | 1 | _aдатчики | |
| 610 | 1 | _aфотометрия | |
| 610 | 1 | _aколориметрия | |
| 610 | 1 | _aпотенциометрия | |
| 610 | 1 | _aцифровые изображения | |
| 700 | 1 |
_aVoskoboynikova _bO. B. _cSpecialist in the field of informatics and computer technology _cSenior Lecturer of Tomsk Polytechnic University _f1990- _gOlga Borisovna _2stltpush _3(RuTPU)RU\TPU\pers\46955 |
|
| 701 | 1 |
_aSukhanov _bA. V. _cspecialist in the field of scientific activity _cLeading expert of Tomsk Polytechnic University, Candidate of chemical sciences _f1983- _gAleksey Viktorovich _2stltpush _3(RuTPU)RU\TPU\pers\31389 |
|
| 701 | 1 |
_aDuerkop _bA. _gAxel |
|
| 712 | 0 | 2 |
_aНациональный исследовательский Томский политехнический университет _bИнженерная школа информационных технологий и робототехники _bОтделение автоматизации и робототехники _h7952 _2stltpush _3(RuTPU)RU\TPU\col\23553 |
| 801 | 2 |
_aRU _b63413507 _c20211209 _gRCR |
|
| 856 | 4 | _uhttp://earchive.tpu.ru/handle/11683/69111 | |
| 856 | 4 | _uhttps://doi.org/10.3390/chemosensors9070177 | |
| 942 | _cCF | ||