New approach: Sample preparation methodology for P-V metal void inspection

2009 ◽  
Author(s):  
Po Fu Chou ◽  
Ru Yu Lin ◽  
Tung-Hung Chen
Keyword(s):  
Sample Preparation ◽  
New Approach

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).

scholarly journals Sample Preparation Techniques for the Analysis of Microplastics in Soil—A Review

2020 ◽  
Vol 12 (21) ◽  
pp. 9074 ◽  
Author(s):  
Daniela Thomas ◽  
Berit Schütze ◽  
Wiebke Mareile Heinze ◽  
Zacharias Steinmetz
Keyword(s):  
Sample Preparation ◽  
Best Practice ◽  
Method Development ◽  
Complex Nature ◽  
Fenton Reagent ◽  
Plastic Pollution ◽  
New Approach ◽  
Practice Methods ◽  
Preparation Techniques ◽  
Soil Constituents

Although most plastic pollution originates on land, current research largely remains focused on aquatic ecosystems. Studies pioneering terrestrial microplastic research have adapted analytical methods from aquatic research without acknowledging the complex nature of soil. Meanwhile, novel methods have been developed and further refined. However, methodical inconsistencies still challenge a comprehensive understanding of microplastic occurrence and fate in and on soil. This review aims to disentangle the variety of state-of-the-art sample preparation techniques for heterogeneous solid matrices to identify and discuss best-practice methods for soil-focused microplastic analyses. We show that soil sampling, homogenization, and aggregate dispersion are often neglected or incompletely documented. Microplastic preconcentration is typically performed by separating inorganic soil constituents with high-density salt solutions. Not yet standardized but currently most used separation setups involve overflowing beakers to retrieve supernatant plastics, although closed-design separation funnels probably reduce the risk of contamination. Fenton reagent may be particularly useful to digest soil organic matter if suspected to interfere with subsequent microplastic quantification. A promising new approach is extraction of target polymers with organic solvents. However, insufficiently characterized soils still impede an informed decision on optimal sample preparation. Further research and method development thus requires thorough validation and quality control with well-characterized matrices to enable robust routine analyses for terrestrial microplastics.

Extraction of estrogen hormones from water samples using an aqueous two-phase system: a new approach for sample preparation in the analysis of emerging contaminants

2021 ◽  
pp. 106231
Author(s):  
Junielly Tomaz Domingues ◽  
Ricardo Mathias Orlando ◽  
Mariana Ramos Almeida ◽  
Leandro Rodrigues de Lemos ◽  
Aparecida Barbosa Mageste ◽  
...  
Keyword(s):  
Sample Preparation ◽  
Water Samples ◽  
Emerging Contaminants ◽  
Phase System ◽  
Two Phase ◽  
New Approach ◽  
Aqueous Two Phase System ◽  
System A

Polypyrrole solid phase microextraction: A new approach to rapid sample preparation for the monitoring of antibiotic drugs

2010 ◽  
Vol 667 (1-2) ◽  
pp. 77-82 ◽  
Author(s):  
Malgorzata Szultka ◽  
Ricarda Kegler ◽  
Patricia Fuchs ◽  
Pawel Olszowy ◽  
Wolfram Miekisch ◽  
...  
Keyword(s):  
Sample Preparation ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
New Approach ◽  
Antibiotic Drugs

Analysis of eicosanoids and related lipid mediators using mass spectrometry

2008 ◽  
Vol 36 (5) ◽  
pp. 1055-1059 ◽  
Author(s):  
Benjamin H. Maskrey ◽  
Valerie B. O'Donnell
Keyword(s):  
Mass Spectrometry ◽  
Cytochrome P450 ◽  
Liquid Chromatography ◽  
Sample Preparation ◽  
Mass Spectrometer ◽  
High Sensitivity ◽  
Lipid Mediators ◽  
Tandem Ms ◽  
New Approach ◽  
Health And Disease

Eicosanoids are oxidized arachidonate-derived lipids products generated by lipoxygenase, cyclo-oxygenase and cytochrome P450. Their bioactivity is mediated via receptor-dependent mechanisms and they are involved in a diverse array of processes in both health and disease. For many years, GC–MS was the method of choice for eicosanoid analysis, but, more recently, the availability of high-sensitivity electrospray LC (liquid chromatography)–MS/MS (tandem MS) has provided a new approach for quantification, while minimizing sample preparation. The present review summarizes the various methods available for routine quantification of eicosanoids, focusing ultimately on their analysis using a hybrid Q-Trap mass spectrometer.

New Approach—Sample Preparation Techniques for Plastic Small Outline Package (Frontside and Backside)

2006 ◽  
Author(s):  
Erwin Marquez ◽  
Dat Nguyen
Keyword(s):  
Sample Preparation ◽  
Preparation Technique ◽  
Lead Frame ◽  
Front Side ◽  
New Approach ◽  
Sample Preparation Technique ◽  
Bond Wires ◽  
Bond Pads ◽  
Preparation Techniques

Abstract As device packages become smaller, the job of failure analysts becomes more difficult. Other complex configurations such as Small Outline Packages (SOP) pose unique problems. The difficulty of removing the encapsulant while preserving the integrity of the die, bond pads, bond wires and lead frame interconnects on a small outline package pose a serious problem. A new sample preparation technique is offered in order to expose the front side and backside of the die. This technique dramatically reduced the risk of damage and ensures the functionality of the device after decapsulation.

A new approach of using polyethylene frits for the quantification of sulphur in copper metals by isotope dilution LA-ICP-MS and comparison with conventional IDMS techniques

2018 ◽  
Vol 33 (9) ◽  
pp. 1506-1517 ◽  
Author(s):  
Pranee Phukphatthanachai ◽  
Jochen Vogl ◽  
Heike Traub ◽  
Norbert Jakubowski ◽  
Ulrich Panne
Keyword(s):  
Sample Preparation ◽  
Isotope Dilution ◽  
New Approach ◽  
Icp Ms ◽  
Alternative Approach ◽  
Conventional Sample

Polyethylene (PE) frits were used to quantify sulphur in copper and its alloys by isotope dilution combined with LA-ICP-MS as an alternative approach to conventional sample preparation.

Sign in / Sign up

Export Citation Format

Share Document