Effective sample preparation procedure for the analysis of free neutral steroids, free steroid acids and sterol sulfates in different tissues by GC–MS

2021 ◽  
Vol 211 ◽  
pp. 105880
Author(s):  
Julia Junker ◽  
Frits Kamp ◽  
Edith Winkler ◽  
Harald Steiner ◽  
Franz Bracher ◽  
...  
Keyword(s):  
Sample Preparation ◽  
Preparation Procedure ◽  
Sample Preparation Procedure ◽  
Free Steroid ◽  
Different Tissues

Experimental design for metal extraction from facial cosmetics samples and determination by square wave voltammetry

2018 ◽  
Vol 10 (44) ◽  
pp. 5327-5334 ◽  
Author(s):  
Lucas Vinicius de Faria ◽  
Thalles Pedrosa Lisboa ◽  
Rafael Arromba de Sousa ◽  
Gustavo Senra Gonçalves de Carvalho ◽  
Maria Auxiliadora Costa Matos ◽  
...  
Keyword(s):  
Experimental Design ◽  
Sample Preparation ◽  
Square Wave Voltammetry ◽  
Metal Extraction ◽  
Preparation Procedure ◽  
Square Wave ◽  
Microwave Assisted ◽  
Wave Voltammetry ◽  
Sample Preparation Procedure ◽  
Extraction Of Metals

An alternative microwave-assisted sample preparation procedure is proposed for the rapid, reliable and easy extraction of metals from facial cosmetics samples.

scholarly journals Solvent Front Position Extraction with Semi-Automatic Device as a Powerful Sample Preparation Procedure Prior to Quantitative Instrumental Analysis

Molecules ◽  
2019 ◽  
Vol 24 (7) ◽  
pp. 1358 ◽  
Author(s):  
Anna Klimek-Turek ◽  
Kamila Jaglińska ◽  
Magdalena Imbierowicz ◽  
Tadeusz Dzido
Keyword(s):  
Sample Preparation ◽  
Automatic Device ◽  
Preparation Procedure ◽  
3D Printer ◽  
Adsorbent Layer ◽  
Solvent Front ◽  
Front Position ◽  
Classical Procedure ◽  
Sample Preparation Procedure ◽  
Prototype Device

The new prototype device is applied to the Solvent Front Position Extraction (SFPE) sample preparation procedure. The mobile phase is deposited onto the chromatographic plate adsorbent layer by the pipette, which is moved, according to programmed movement path, by a 3D printer mechanism. The application of the prototype device to SFPE procedure leads to the increased repeatability of the results and significant reduction of the analysis time in comparison to the classical procedure of chromatogram development. Additionally, the new equipment allows use procedures that are not possible to run using the classic chromatogram development. In this paper, the results of manual and semi-automatic sample preparation with SFPE are compared and the possible application of this prototype device is discussed.

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