Temat: sample extraction - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Agreement of different methods for assessment of progesterone concentrations in beef cattle serum
Autorzy:: Rekešiūtė, A.
Januškauskas, A.
Šiukščius, A.
Riškevičienė, V.
Vitkauskienė, A.
Verkauskienė, R.
Antanaitis, R.
Žilinskas, H.
Powiązania:: https://bibliotekanauki.pl/articles/2087384.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: agreement
confidence interval
assessment methods
progesterone
sample extraction
ELISA
RIA
Źródło:: Polish Journal of Veterinary Sciences; 2019, 4; 695-701
1505-1773
Pojawia się w:: Polish Journal of Veterinary Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Sample Preparation Followed by High Performance Liquid Chromatographic (HPLC) Analysis for Monitoring Muconic Acid as a Biomarker of Occupational Exposure to Benzene
Autorzy:: Shahtaheri, S. J.
Ghamari, F.
Golbabaei, F.
Rahimi-Froushani, A.
Abdollahi, M.
Powiązania:: https://bibliotekanauki.pl/articles/91059.pdf
Data publikacji:: 2005
Wydawca:: Centralny Instytut Ochrony Pracy
Tematy:: benzene
muconic acid
sample preparation
solid-phase extraction
biological monitoring
chromatography
Opis:: Factors affecting solid phase extraction (SPE) of trans,trans-muconic acid (ttMA), as a benzene biomarker, including sample pH, sample concentration, sample volume, sample flow rate, washing solvent, elution solvent, and type of sorbent were evaluated. Extracted samples were determined by HPLC-UV (high performance liquid chromatography-ultraviolet). The analytical column was C18, UV wave length was 259 nm, and the mobile phase was H2O/methanol/acetic acid run at flow rate of 1 ml/min. A strong anion exchange silica cartridge was found successful in simplifying SPE. There was a significant difference between recoveries of ttMA when different factors were used (p < .001). An optimum recovery was obtained when sample pH was adjusted at 7. There was no significant difference when different sample concentrations were used (p > .05). The optimized method was then validated with 3 different pools of samples showing good reproducibility over 6 consecutive days and 6 within-day experiments.
Źródło:: International Journal of Occupational Safety and Ergonomics; 2005, 11, 4; 377-388
1080-3548
Pojawia się w:: International Journal of Occupational Safety and Ergonomics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Propozycje innowacyjnych sorbentów w przygotowaniu próbek biologicznych
Proposals of innovative sorbents in the preparation of biological samples
Autorzy:: Pajewska-Szmyt, Martyna
Gadzała-Kopciuch, Renata
Buszewski, Bogusław
Powiązania:: https://bibliotekanauki.pl/articles/1413237.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Chemiczne
Tematy:: metody przygotowania próbki
dyspersyjna ekstrakcja do fazy stałej
próbki biologiczne
polimery z odciśniętą cząsteczką
sample preparation method
dispersive solid phase extraction
biological sample
molecularly imprinted polymers
Opis:: The sample preparation stage is a critical step in the whole analytical procedure as it often determines the efficiency of the process. What is particularly noticeable in the area of biological samples. Blood, milk, urine, saliva or tissue are only few examples of complicated biological matrix, that require a optimization of sample pre-treatment method for particular analytes. For these purpose, the aim of following chapter was to characterized main problems with sample preparation method as well as highlighted some innovative ways how to improve sample preparation stage. Attention was particularly focused on the use of dispersive solid phase extraction (dSPE), which has achieved high growth in interest in recent years, mainly due to the simplicity and rapidity of performance. This method is not only used with commercially available sorbents, but also provides a basis for trying to apply new analytical tools for separation of analytes from matrix. Following the trends of nanotechnology and within the rules of green analytical chemistry, scientists are facing the challenges of determining and identifying compounds from various chemical groups. Frequently targeting analytes at trace concentration levels as well biological samples. In addition, attention is also focused on reagents reduction and shorter analysis time but also in terms of minimization of sample volume, which should to be collected. Herein the chapter presented describes exemplary new proposals in sorbents such as molecularly imprinted polymers (MIPs), supported ionic liquids (ILs), dendrimers and metal-organic framework (MOFs). In addition, it also looked at the potential use of magnetic nanoparticles as carriers. New sorbents in sample preparation together with modem instrumental techniques therefore allow the development of a procedure that will be characterized by high selectivity and specificity.
Źródło:: Wiadomości Chemiczne; 2021, 75, 7-8; 1075-1088
0043-5104
2300-0295
Pojawia się w:: Wiadomości Chemiczne
Dostawca treści:: Biblioteka Nauki

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