CLINICALCHEMISTRY, Vol. 34, No. 3, 1988 599 2. Stockigt JR, De Garis M, Barlow JW. “Unbound analog” methods for free T4: a note of caution. N Engi J Med 1982;307:126. 3. De Nayer P, Malvaux P, Beckers C. Familial dysalbuminemic hyperthyroxinemia (FDH): inadequacy of the “analog” methods for assaying free T4 levels. Eur J Nuci Med 1984;9:284-5. 4. Stockigt JR, Dyer SA, Mohr VS. White EL, BarlowJ...

a Department of Chemistry & Chemical Biology, Harvard University, Cambridge, MA 02138 b School of Engineering and Applied Science, Harvard University, Cambridge, MA 02138 c Departamento de Química Física y Analítica, Universidad de Oviedo, Asturias, Spain d Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, MA 02138 USA e The Kavli Insitute for Bionano Science,...

INTRODUCTION Pulsed amperometry is a powerful detection method for carbohydrates that requires no sample derivatization. Pulsed amperometric detection (PAD) is particularly useful in combination with high-performance anion-exchange chromatography (HPAE). For a full description of HPAEPAD, refer to Dionex Technical Note 20. For an introduction to amperometry refer to Conductivity and Amperometry...

Chloroquine and Hydroxychloroquine drugs are widely prescribed for malaria disease. Since the end of 2019, humans have been under threat due to a disease called (COVID-19), which was first reported in China. Many methodical approaches quantify chloroquine hydroxychloroquine blood, urine, plasma, serum, pharmaceutical dosage form. Some these techniques spectrophotometry, liquid chromatography wi...

This paper describes an inexpensive, handheld device that couples the most common forms of electrochemical analysis directly to "the cloud" using any mobile phone, for use in resource-limited settings. The device is designed to operate with a wide range of electrode formats, performs on-board mixing of samples by vibration, and transmits data over voice using audio--an approach that guarantees ...

A simple and fast electrochemical method for quantitative analysis of picric acid explosive (nitro-explosive) based on its electrochemical reduction at copper surfaces is reported. To achieve a higher sample throughput, the electrochemical sensor was adapted in a flow injection system. Under optimal experimental conditions, the peak current response increases linearly with picric acid concentra...

in this paper, the effect of penicillin g drug as a green corrosion inhibitor on mild steel in 1.0 mhydrochloric acid solution has been investigated using potentiodynamic polarization, electrochemicalimpedance spectroscopy (eis) and electrochemical noise (en) techniques. the inhibition efficiencywas found to increase with increasing inhibitor concentration. potentiodynamic polarizationmeasureme...

This study reported on the possibility of intoxications of non-target wild animals associated with use of bromadiolone as the active component of rodenticides with anticoagulation effects. A laboratory test was done with earthworms were exposed to bromadiolone-containing granules under the conditions specified in the modified OECD 207 guideline. No mortality of earthworms was observed during th...

The development of more intricate devices for the analysis of small molecules and protein activity in single cells would advance our knowledge of cellular heterogeneity and signaling cascades. Therefore, in this study, a nanokit was produced by filling a nanometer-sized capillary with a ring electrode at the tip with components from traditional kits, which could be egressed outside the capillar...