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 Open

Presents the pdf analysis as premium feature

PDF Analysis

Insights

Presents the summarisation as premium feature

Summarisation

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

A statistically sound evaluation is made of the United States Environmental Protection Agency's perchlorate Method 332.0 by tandem ion chromatography-mass spectrometry-mass spectrometry. Two microbore formats and one capillary format are used with a deionized-water matrix. The evaluation is made for raw peak-area data and for analyte responses scaled by the internal standard, over an analyte concentration range of 0.25 to 200 µg/L. Results indicate that:  (i)  the internal-standard signal is suppressed by the analyte in both microbore formats;  (ii)  the analyte signal is not affected by the internal standard;  (iii)  models for the calibration curves usually contain bias;  (iv)  the measurement uncertainty is similar in magnitude for both the peak-area- and ratio-based curves.

journal of chromatographic science

United States Environmental Protection Agency Perchlorate Method 332.0 via Microbore and Capillary Chromatographic Formats: Statistical Evaluation of the Use of  18 O-Perchlorate Internal Standard with Deionized-Water Matrices