scholarly journals Integrated Aerodynamic/Electrochemical Microsystem for Collection and Detection of Nanogram-level Airborne Bioaccessible Metals

2021 ◽  
pp. 130903
Author(s):  
Yi-Bo Zhao ◽  
Jiukai Tang ◽  
Tianyu Cen ◽  
Guangyu Qiu ◽  
Weidong He ◽  
...  
Keyword(s):  
Nanogram Level

Thermal lens studies of the reaction of iron(II) with 1,10-phenanthroline at the nanogram level

2001 ◽  
Vol 369 (6) ◽  
pp. 535-542 ◽  
Author(s):  
Valerii V. Chernysh ◽  
Mikhail Yu. Kononets ◽  
M. A. Proskurnin ◽  
Svetlana V. Pakhomova ◽  
Vsevolod V. Komissarov ◽  
...  
Keyword(s):  
Thermal Lens ◽  
Nanogram Level

New Instrumental Combustion Method for the Microdetermination of Phosphorus

1970 ◽  
Vol 53 (4) ◽  
pp. 780-786
Author(s):  
PAul R Handy ◽  
Alexander Macdonald
Keyword(s):  
Organic Compounds ◽  
Combustion Method ◽  
Combustion Products ◽  
Porous Polymer ◽  
Analysis Time ◽  
Final Measurement ◽  
Phosphorus Containing ◽  
Polymer Bead ◽  
Nanogram Level

Abstract An apparatus has been designed for the determination of microgram quantities of phosphorus-containing compounds. Both inorganic and organic compounds are reduced to phosphine under a stream of hydrogen in a quartz tube at 900-1000°C. The phosphine is separated from other combustion products on sequential alumina and porous polymer bead columns with final measurement by a thermionic GLC detector. The method routinely requires microgram samples with sensitivity capabilities to the nanogram level. The analysis time per sample is less than 5 min.

Column deactivation in analysis for underivatized tricyclic antidepressants by gas chromatography with use of a nitrogen detector.

1983 ◽  
Vol 29 (3) ◽  
pp. 452-455 ◽  
Author(s):  
B Vinet
Keyword(s):  
Tricyclic Antidepressants ◽  
Antidepressant Drugs ◽  
Glass Tube ◽  
Solid Support ◽  
Tricyclic Antidepressant ◽  
Low Flow ◽  
Sensitive Detector ◽  
Linear Calibration ◽  
Deactivation Process ◽  
Nanogram Level

Abstract I describe deactivation treatment of the OV-17 chromatographic column to minimize adsorption of tricyclic antidepressant drugs on the solid support of the column. The procedure involves heat treatment at 399 degrees C under a low flow of nitrogen, with bleeding of OV-17 liquid phase from the injector tube into the column. The column is then conditioned with vapors of phenyldiethanolamine succinate, added to the carrier gas stream by bleeding from a coated injector glass tube. This deactivation process much improves the chromatographic performance of the column, allowing a sensitivity at the nanogram level with a nitrogen-sensitive detector. Determinations of tricyclic antidepressants in plasma with such a deactivated column results in a low CV and a linear calibration curve, reflecting the effectiveness of the deactivation.

Nanochannel-driven rapid capture of sub-nanogram level biomarkers for painless preeclampsia diagnosis

2020 ◽  
Vol 163 ◽  
pp. 112281 ◽  
Author(s):  
Ye-Eun Kang ◽  
Keum-Yong Seong ◽  
Sang-Gu Yim ◽  
Yechan Lee ◽  
Sung-Min An ◽  
...  
Keyword(s):  
Nanogram Level

Confirmation of paranitrophenol as a human urinary metabolite at the nanogram level

1979 ◽  
Vol 27 (4) ◽  
pp. 757-759 ◽  
Author(s):  
Kenneth W. Kirby ◽  
Jeffrey E. Keiser ◽  
Joseph Groene ◽  
Edwin F. Slach
Keyword(s):  
Urinary Metabolite ◽  
Nanogram Level

Enzymatic determination of alcohol mixtures at the nanogram level by the stopped-flow technique

1993 ◽  
Vol 274 (1) ◽  
pp. 109-116 ◽  
Author(s):  
Eva Förster ◽  
Manuel Silva ◽  
Matthias Otto ◽  
Dolores Pérez-Bendito
Keyword(s):  
Stopped Flow ◽  
Enzymatic Determination ◽  
Alcohol Mixtures ◽  
Nanogram Level
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