This document describes best practices for analysis of dissolved organic matter (dissolved carbon and total nitrogen) in seawater samples. Included are SOPs sample collection storage, details laboratory using high temperature combustion on Shimadzu TOC analyzers, suggestions quality control assurance. Although written specifically GO-SHIP oceanographic community practices, many aspects processi...

A simple sensitive spectrofluorimetric method was developed for the analysis of total coumarins calculated as scopoletin in the plants Evolvulus alsinoides and Convulvulus pluricaulis. The fluorescent nature of scopoletin proved to be of immense value in the development of the spectrofluorimetric method. The excitation and emission wavelengths for scopoletin were 430 nm and 460 nm respectively ...

A simple, precise, rapid and accurate RP-HPLC method has been developed for the simultaneous estimation of Amlodipine besylate and Hydrochlorthiazide in tablet formulations. The chromatographic separation was achieved on a Shimadzu Symmetry C18 column (250 mm x 4.6mm, 5.0 μ particle size) using Methanol: Acetonitrile: 50mM Na2HPO4 pH7.0 (60:20:20v/v/v) with 1% triethylamine. Flow rate was 1ml/m...

Appropriate conditions have been achieve d for the accurate, rapid, and highly precise shipboard simultaneous determination of dissolved organic carbon and total dissolved nitrogen in seawater by high tem perature catalytic oxidation. A nitrogen-specific Antek 705D chemiluminescence detector and a CO 2-specific LiCor Li6252 IRGA have been coupled inseries with a Shimadzu TOC-5000 organic carbon...

One of the main problems in production tablets, which has significant negative consequences, is segregation tablet mixture leading to inhomogeneity dosage units, material losses manufacturing process and improperness specified pharmaceutical technical characteristics mixture.
 The aim research. This work aims at study substances N-acetyl-D-glucosamine Actimask® Acetaminophen determination ...

This article aims to investigate the mechanical characteristics of specimens fabricated using Selective Laser Sintering technology. The research covers flexural specimens, produced by PA12 materials. CAD model dimensions were selected according ISO 178 standard, and chosen specimen geometry is 96 x 8 4 [mm] in bulk. All a specialized machine Fuse 1 (FormLabs, Summerville, MA). Four batches prod...

Automated carbon analyzers often are configured to provide estimates of both total organic carbon (TOC) and nonpurgeable organic carbon (NPOC). We show there can be an overestimation of total carbon in the presence of moderate to large quantities of dissolved inorganic carbon. This leads to overestimates of TOC, which is measured as the difference between total carbon and inorganic carbon. Wate...

Matrix-assisted laser desorption/ionization imaging mass spectrometry (MALDI-IMS) is a useful techniques that allows to derive the spatial distribution of numerous molecules ionized on a tissue section. Selection of the suitable matrix is the key to ionize molecules of interest in MALDI. Each matrix has its own characteristics such as being proper for ionizing molecules in either positive or ne...