English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Pro

Presents the zaia usage as premium feature

ZAIA

Presents AI Discovery search usage as a premium feature

AI Discovery

Presents AI Discovery explain and summary usage as a premium feature

Content Analysis

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Presents the pdf analysis as premium feature

PDF Analysis

1500 Top-up

3000 Top-up

Zendy Basic

2500 Top-up

Zendy Unlimited

Presents the access of premium content as premium feature

Premium Content

A fully automated technique for the extraction and clean-up of low-molecular weight analytes from human serum and urine is presented. Its efficiency for sample clean-up prior to immunological assay is demonstrated for six adrenal and gonadal steroid hormones, calcidiol and the peptide hormones gastrin, insulin and glucagon. A more intensive sample clean-up, which is mandatory for liquid chromatographic analysis, is reported for serum cortisol. With the exception of calcidiol, the extraction of steroids is almost complete. Recovery of peptides is about 80% and depends on the nature of the peptide and on protein-analyte dissociating diluents. Precision of recovery is lower than 7% (CV) for all analytes studied. One hundred serum or urine samples can be cleaned up without loss of efficiency by only one solid-phase cartridge. The technique is in principle applicable to all other analytes with physico-chemical structures similar to the analytes in the present study.

A Fully Automated Method for Sample Clean-Up Prior to Chromatographie and Immunological Analysis