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Hellma Analytics, founded in 1922, is the world market leader in cells and optical components made of glass or quartz glass, used for modern optical analysis. Hellma Analytics has its own subsidiaries in 11 countries as well as several representatives all over the world. Our product range with mor more
We manufacture products to handle smallest amounts of liquids. Microliter syringes, pipettes, dilutors, pipetting robots, complete analysers as well as electrodes, HPLC and GC columns belong to our assortment. more
Waters Corporation is a global leader in liquid chromatography (UPLC/HPLC), mass spectrometry (MS), rheology and thermal analysis. The business areas range from research & development, the manufacture and sale of analytical instruments, laboratory software products, column and sample preparation pro more
pH buffer solutions are used to calibrate pH instruments and acid-base titrators electrodes in pharmaceutical QC and production. The European Pharmacopeia (EP) and United States Pharmacopeia (USP) describe the preparation of pH buffer solutions using solid substances more
Verify your Spectrophotometer using Starna Certified Reference Materials – trusted by end-users worldwide for their excellent quality and reliability more
Ensure conformity with regulations (Ph. Eur., USP) and provide for highest process transparency with reference materials for UV/Vis spectroscopy. more
Starna Scientific offers the world's widest range of Certified Reference Materials for the entire wavelength range from deep UV to NIR (190 - 2850 nm) more
A high-tech version of an old-fashioned balance scale at the National Institute of Standards and Technology (NIST) has just brought scientists a critical step closer toward a new and improved definition of the kilogram. The scale, called the NIST-4 watt balance, has conducted its first measurement o more
The National Institute of Standards and Technology (NIST) has issued a new ruler. Designed to be the most accurate commercially available "meter stick" for the nano world, the new measuring tool — a calibration standard for X-ray diffraction — boasts uncertainties below a femtometer. That's roughly more
SCP SCIENCE has reached an agreement to purchase Conostan, an oil-based standards manufacturing division of ConocoPhillips. Located in Ponca City, Okla., Conostan is a manufacturer and supplier of oil-based analytical standards used for calibration or verification of instruments for analysis of orga more
Regular testing of spectrophotometers with certified reference materials secures the traceability of measuring results to international standards (e.g. NIST, ASTM). Hellma reference materials for UV/Vis spectroscopy ensure conformity with regulations (Ph. Eur., USP) and provide for highest process t more
Abstract RATIONALE The monomer 1‐vinyl‐2‐pyrrolidone (VP) is a substance with excellent solvent features. It is used in a wide variety of pharmaceutical, cosmetic, food industrial or technical applications and produced in industrial scale. Since VP has caused adenocarcinoma of the nasal cavity more
Highly homogeneous multi-element gelatin calibration standards were fabricated for quantitative LA-ICP-MS bioimaging. Heterogeneity issues caused by the so-called “coffee-stain” and/or “Marangoni” effects were found to be element-dependent but could be circumvented by careful selection of drying/set more
IJMS, Vol. 18, Pages 1800: Determination of Sphingosine-1-Phosphate in Human Plasma Using Liquid Chromatography Coupled with Q-Tof Mass Spectrometry International Journal of Molecular Sciences doi: 10.3390/ijms18081800 Authors: Emmanuel Eroume-A Egom Ross Fitzgerald Rebecca Canning Re more
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