235 Results for: "merck indicators"

Supplier: Merck

indicator for metal titration, Supelco®

Supplier: Merck

Kjeldahl catalyst acc. to Wieninger, Contents: >94% Na₂SO₄; >1,45% CuSO₄; >1,5% Se

Supplier: SIGMA ALDRICH MICROSCOPY

Indicator for organolithium assay.

Supplier: Merck

CASO broth is a universal culture medium, a selective and differential medium for the primary isolation of members of the protease without indicator or inhibitor. Intended for a broad range of applications.

Supplier: Merck

NaCl in H₂O

Supplier: MERCK PRODUCTION CHEMICALS

Starch, soluble, extra pure pH 6.0 - 7.5 (20 g/l, H₂O, 25 °C)., SAFC®

Supplier: Merck

Ammonium Standard, Ammonium standard solution, 1000 mg/L, Certipur®, Supelco®, Contents: NH₄Cl in H₂O, Application: Ion chromatography standards

Supplier: Merck

The LuxPlate® range of high fluorescence TLC plates contains an increased amount of fluorescent dye making it easier to identify small amounts of isolated material. Furthermore, the amount of binder added is elevated, resulting in a significantly brighter TLC plate with an even more stable and robust surface.

Supplier: Merck

CN- and DIOL-modified silica plates are moderately polar that are suitable for both normal and reversed phase systems. The amino modified NH₂ plate provides weak basic ion exchange characteristics with special selectivity for charged compounds offering an alternative to PEI cellulose.

Supplier: SIGMA ALDRICH MICROSCOPY

Methyl Purple,in H2O (Methyl Purple indicator solution)

Supplier: Merck

Phosphate standard, Titrisol®, 1000 mg/l, Titrisol®, Supelco®, Contents: H₃PO₄ in water, Application: Ion chromatography standards

Supplier: Merck

Silica gel, Pore size: 60 Å (0.2-0.5 mm) for column chromatography, Millipore®

Supplier: Merck Millipore (Novagen)

Molecular size markers for routine use in plasmid cloning, the Perfect DNA™ markers contain sets of DNA species having convenient, easy-to-remember sizes for agarose gel analysis. The markers have uniform band intensities except for the indicated reference bands, which are useful for instant band identification.

Supplier: Merck

Coupling TLC plates to mass spectrometry is a new field of high interest, which will contribute strongly to the progress of planar chromatography. The MS-grade plates are much cleaner than standard TLC/HPTLC plates providing higher sensitivity and reduced background signals. This allows trace analysis with mass spectrometry detection in lower nanogram range.

Supplier: Merck

Chloride standard, concentrate Titrisol®, 1000 mg/l, Titrisol®, Supelco®, Matrix: H₂O, Contents: from HCl, Application: Ion chromatography standards, Analytical testing

Supplier: MERCK PRODUCTION CHEMICALS

Elemental impurity specifications have been set considering ICH Q3D (Guideline for Elemental Impurities). Class 1-3 elements are not likely to be present above the ICH Q3D option 1 limit, unless specified and indicated (*).

Supplier: Merck

NH₄Cl in H₂O

Supplier: Merck

Our NH₂, CN- and DIOL-modified silica sorbents are less polar then conventional silica phases, making them ideal for separating hydrophilic or charged substances. Our moderately polar cyano- and diol-modified silica plates can be used for both normal phase and reversed phase systems. An alternative to PEI cellulose, amino-modified NH₂ plates provide weak basic ion exchange characteristics with special selectivity for charged compounds.

Supplier: Merck

HPTLC LiChrospher® plates are based on spherical-shaped silica 60 with a particle size of 7 µm, and narrow particle size distribution similar to the phases used in HPLC. LiChrospher® HPTLC plates possess a selectivity that is comparable to respective HPTLC plates, however, plate height and separation numbers are further improved resulting in shorter analysis times.

Supplier: SIGMA ALDRICH MICROSCOPY

Suitable for titration of morpholine

Supplier: MERCK PRODUCTION CHEMICALS

Elemental impurity specifications have been set considering ICH Q3D (Guideline for Elemental Impurities). Class 1-3 elements are not likely to be present above the ICH Q3D option 1 limit, unless specified and indicated (*). Corresponds to Ph Eur,BP,NF,FCC,E 211

Supplier: SIGMA ALDRICH MICROSCOPY

It contains p-Phenylenediamine diHCL (1 part) and catechol (2 parts). Commonly referred to as Hanker Yates reagent. Kit component in the Sigma Leukocyte peroxidase (myeloperoxidase) Procedure, 390A.

Supplier: Merck

RP-2, RP-8 and RP-18 are based on silica gel 60 modified with aliphatic hydrocarbons. The chain length, in combination with the degree of modification, defines the ability to tolerate water in the solvent system and strongly affects retention. Migration time increases in the order RP-2, RP-8 and RP-18 using the same solvent composition. RP-8 and RP-18 can be run with up to 60% water in the solvent system.

Supplier: SIGMA ALDRICH MICROSCOPY

An intracellular fluorescent pH indicator.

Supplier: Merck

Titrisol® standards are traceable to standard reference material from NIST.

Supplier: Merck Millipore (Calbiochem‎)

A variable mixture of cell-permeable ester derivatives of BCECF that are hydrolyzed by cytosolic esterases to yield intracellularly trapped indicator BCECF. Has been used to monitor intracellular pH changes in mammalian fibroblasts, gastric cells, lymphocytes, myocytes, and distal convoluted tubule

Supplier: Merck Millipore (Calbiochem‎)

A cationic, fluorescent, carbocyanine dye that can be used as a ratiometric indicator of mitochondrial potential δΨm in cells, tissues, and isolated mitochondria.

Supplier: SIGMA ALDRICH MICROSCOPY

3-Methoxydiphenylamine can be used in the preparation of 3- methoxydiphenylamine-4-diazonium salts (MDP-4-DS) and the corresponding diazoresins.[1] Diazonium salts and diazoresins find applications in dyes, stains, indicators, general laboratory use, and industrial applications.

Supplier: SIGMA ALDRICH MICROSCOPY

Calcium-specific chelator and indicator. Upon binding calcium there is a shift in the UV spectrum and an enhancement of fluorescence.

Supplier: Merck

In addition to the traditional 5 g Kjeldahl tablets, which are added as catalysts to the digestion mixture, Merck Millipore can offer the 3,5 g tablet. This gives the flexibility needed to find the optimal setting for the catalyst/sulphuric acid ratio.