Directly suspended droplet microextraction combined with single drop back-extraction as a new approach for sample preparation compatible with capillary electrophoresis

Talanta ◽  
2011 ◽  
Vol 83 (5) ◽  
pp. 1673-1679 ◽  
Author(s):  
Wenhua Gao ◽  
Gaopan Chen ◽  
Tufeng Chen ◽  
Xiaoshan Zhang ◽  
Yaowen Chen ◽  
...  
Keyword(s):  
Capillary Electrophoresis ◽  
Sample Preparation ◽  
Back Extraction ◽  
Single Drop ◽  
New Approach ◽  
Directly Suspended Droplet Microextraction ◽  
Suspended Droplet

Facile and highly efficient three-phase single drop microextraction in-line coupled with capillary electrophoresis

2021 ◽  
pp. 462520
Author(s):  
Sunkyung Jeong ◽  
Joseph E. Valdez ◽  
Natalia Miękus ◽  
Joon Yub Kwon ◽  
Wooyong Kwon ◽  
...  
Keyword(s):  
Capillary Electrophoresis ◽  
Single Drop ◽  
Highly Efficient ◽  
Three Phase ◽  
Single Drop Microextraction

A new approach to the quality control of steroid receptor assays.

1988 ◽  
Vol 34 (10) ◽  
pp. 2076-2079
Author(s):  
M Borsotti ◽  
M Quercioli ◽  
R D'Ettole ◽  
A Piffanelli ◽  
G Messeri
Keyword(s):  
Quality Control ◽  
Sample Preparation ◽  
Steroid Receptors ◽  
Menopausal Status ◽  
Steroid Receptor ◽  
Usual Practice ◽  
New Approach ◽  
Breast Tumor Tissue ◽  
Consensus Mean ◽  
Receptor Assays

Abstract Lyophilized cytosols prepared from calf uterus and human breast tumor tissue are commonly used to assess the reliability of routine steroid receptor assays. However, preanalytical error (sample preparation, storage, homogenization) cannot be detected in this way. Participating laboratories were asked to mail us all their receptor results obtained over a four-month interval, and to include some information about the patients involved (age, menopausal status, nodal status). After verifying the homogeneity of the populations investigated, we computed consensus means for the percentages of positive samples and for their absolute value. Despite the homogeneity of the characteristics of the populations studied, results from some laboratories systematically differed from the consensus mean. This approach to the quality control of steroid receptors allows evaluation of the whole procedure, from sample preparation to analysis, and thus may be helpful as an addition to the usual practice of distribution of cytosols and tissue powders for assay.

scholarly journals A new approach to mixing techniques for enhanced performance in automated sample preparation

1995 ◽  
Vol 17 (5) ◽  
pp. 169-171
Author(s):  
François Qian ◽  
Eric Vérette ◽  
Atika El-Sayed
Keyword(s):  
Sample Preparation ◽  
Glucose Solution ◽  
New Approach ◽  
Relative Standard ◽  
Different Types ◽  
Mixing Method ◽  
Automated Sample Preparation ◽  
Standard Deviations ◽  
Mixing Techniques ◽  
Sample Dilution

In the automation of sample dilution or derivatization, the performance of the mixing technique employed when adding solvents or reagents to samples is critical. This paper presents a newly developed mixing method, based on conventional aspiration and dispensing of liquid techniques, but which considerably improves the precision of mixing. The paper discusses the results of a comparison of the technique with other methods and describes the application of the technique to several different types of sample solutions, including a highly concentrated glucose solution. The mixing technique was performed on a Gilson XL Sampling Injector, with a 1/25 dilution of a paraben solution in 2 ml vials to give relative standard deviations of 0.2 to 0.3% (N =10).

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