"Spectrophotometer"

Supplier: Hellma

An alkaline liquid concentrate, which is typically diluted to 2% with water for cleaning quartz and glass cells. It can also be used to clean other sensitive optical components made of glass, quartz, sapphire and porcelain.

Supplier: Merck

Simple reagent kits, used in food analysis, that use colour chemistry to determine levels of protein and fibre. Please note these kits require the use of a photometer or spectrophotometer.

Supplier: Merck

The colour reference solution can be used in visual comparison or as part of a calibration of colorimeters and spectrophotometer for colour comparison. The solution can be used to prepare reference solution with different Hazen values.

Supplier: VWR Chemicals

Bandwidth standards.

Supplier: THERMO ORION

Orion™ AQUAfast™ COD reagents in digestion tubes are designed for use with Orion™ AQUAfast™ colorimeters and Orion™ AquaMate Vis and UV-Vis spectrophotometers. Just add the sample to the COD digestion tube, digest sample in thermoreactor and measure.

Supplier: G BIOSCIENCES

Protein assay, Assay cuvettes (1 ml)

Supplier: Liebherr

The didymium liquid filter consists of praseodymium and neodymium, dissolved in perchloric acid. This filter is ideally suited for checking the wavelength accuracy of spectrophotometers in the UV and visible range. It has a spectrum with a variety of characteristic, very well-defined peaks in the range between 320 and 870 nm.

Supplier: VWR Chemicals

Stray light standards packed in permanently sealed UV cuvettes or 100 ml amber bottle.

Supplier: VWR Chemicals

Linearity standards packed in permanently sealed UV cuvettes or 100 ml amber bottles.

Supplier: TINTOMETER

Verification accuracy of photometers and validity of results.

Supplier: MICROSOLV

Wavelength calibration standard solution for UV-Vis detectors is composed of 4% Holmium oxide in 10% Perchloric acid.

Supplier: USP

USP Reference Standards are specified for use in conducting official USP–NF tests and assays. USP also provides Reference Standards specified in the Food Chemicals Codex as well as authentic substances—high-quality chemical samples—as a service to analytical, clinical, pharmaceutical and research laboratories. To confirm accuracy and reproducibility, USP Reference Standards are rigorously tested and evaluated by multiple independent laboratories including USP, commercial, regulatory, and academic labs. USP also provide publicly available, official documentary standards for pharmaceutical ingredients in the USP–NF that link directly with our primary reference standards.

Supplier: Merck

A reference standard for chlorine, chlorine dioxide and ozone, that is designed to reassure the user about the accuracy and reliability of the results from the Picco and Multy colorimeters.

Supplier: G BIOSCIENCES

β-Galactosidase assay is for determining the β-galactosidase activity in the lysates of cells transfected with a β-galactosidase expression construct. It uses chlorophenol red-β-D-galactopyranoside (CPRG), which is up to 10 times more sensitive than the classic O-nitrophenyl-β-D-galactopyranoside (ONPG) β-Galactosidase assays. This increased sensitivity makes it simpler to measure β-galactosidase activity in cells that are difficult to transfect or have low β-galactosidase activity expression. β-Galactosidase activity is measured using a spectrophotometer or a microplate reader to determine the amount of substrate converted at 570 to 595 nm.

Supplier: Merck

Spectroquant® CombiCheck solutions are ready to use multi-parameter standards for the range of applications of Spectroquant® test system. Each pack contains a standard solution and a spiking solution. Both solutions can be used for quality assurance as they are, without dilution.

Supplier: VWR Chemicals

Wavelength standards (certified at 0,1; 0,2; 0,5; 1 and 2 nm slit widths) packed in six permanently sealed UV cuvettes or 100 ml amber bottles.