447 Results for: "Titration Solutions"

Supplier: Adipogen

TMBZ is a chromogenic reagent utilized for peroxidase detection. It has been developed as an alternative to benzidine. Although the TMBZ solution is colorless, it turns bluish-green (lambdamax: 655 nm) in the presence of hydrogen peroxide and peroxidase. The structure of this bluish-green complex is thought to be a radical form of two oxidized TMBZ molecules. This peroxidase substrate is used in staining procedures in immunohistochemistry as well as being a visualising reagent used in enzyme-linked immunosorbent assays (ELISA). The substrate produces a soluble end product that is pale blue in color and can be read spectrophotometrically at 370 or 620-650 nm. The TMB reaction may be stopped with 2M H2SO4 (resulting in a yellow color), and read at 450nm.

Supplier: TCI America

Streptomycin sulfate is the first aminoglycoside antibiotic derived from the soil microbe Streptomyces griseus by Waksman and Schatz

Supplier: MP Biomedicals

Tricine was first prepared by Good for use as a buffer for chloroplast reactions. It is structurally similar to Tris, but is much less inhibitory at high concentrations. For ATP assays using firefly luciferase, tricine buffer at 25 mM was found to be the best of ten common buffers tested.
Tricine is used as buffer component for separation of low molecular weight peptides. Tricine can be used in cryopreservation medium for the preservation of tissues and organs. Cryopreservation depends on the physical and chemical characteristics of the preservation medium used. The pH values and pK values for tricine/DMSO mixtures has been reported down to -20 °C. Tricine has been found to be an efficient scavenger of hydroxyl radicals in a study of radiation-induced membrane damage. Tricine is typically the buffer of choice in SDS-PAGE systems when separating proteins in the range of 1 to 100 kDa.
A buffer may be prepared by titrating with sodium hydroxide to the desired pH, using about a half-equivalent of NaOH.

Supplier: Adipogen

Water soluble pH indicator used in the 6.8 (yellow) to 8.2 (red) range and frequently used in cell biology laboratories. Widely used as cell tissue culture pH marker. A small amount of phenol red added to the growth medium will have a pink-red color under normal conditions. Typically, 15 mg/l are used for cell culture. In the event of problems, waste products produced by dying cells or overgrowth of contaminants will cause a change in pH, leading to a change in indicator color. For example, a culture of relatively slowly dividing mammalian cells can be quickly overgrown by bacterial contamination. This usually results in an acidification of the medium, turning it yellow. The waste products produced by the mammalian cells themselves will slowly decrease the pH, gradually turning the solution orange and then yellow. This color change is an indication that even in the absence of contamination, the medium needs to be replaced. Shown to be a weak estrogen mimic (possible through inpurities), which can enhance the growth of cells that express the estrogen receptor in cell cultures. Might be useful as a differentiation factor.

Supplier: MilliporeSigma

Supplier: Adipogen

A sensitive reagent for measuring the free sulfhydryl content in proteins, peptides, and tissues. Used to characterize reactive thiol groups and photometric determination of thiols and for measuring low-molecular mass thiols such as glutathione in both pure solutions and biological samples, such as blood. It can also measure the number of thiol groups on proteins. Through reaction with aliphatic thiol groups a mixed disulfide of protein thiol and one mole of 2-nitro-5-thiobenzoate per mole of protein sulfhydryl group is being formed. DTNB has little absorbance. Reaction with -SH groups on proteins (from any solvent accessible Cys) under mild alkaline conditions (pH 7-8) produces the 2-nitro-5-thiobenzoate anion, which gives an intense yellow color with an absorption maximum at 409.5nm (Extinction coefficient: 14150 M-1*cm-1). Sensitive to various buffer ions, therefore, the extinction coefficient used to calculate the number of sulfhydryl groups must be matched to the reaction conditions. In case the thiol groups are in disulfide bonds, they must be reduced under anaerobic conditions prior to reaction with DTNB.

Supplier: Ward's Science

Perform a common analytical technique, complexometric titration, to quantify calcium in samples.

Supplier: BDH

Starch 0,5% (w/v) in aqueous solution, VWR Chemicals BDH®

Supplier: MilliporeSigma

Sodium hydroxide 0.1 mol/l (0.1 N) in aqueous solution, Titripur® Reag. Ph. Eur. volumetric solution, Supelco®

Supplier: MilliporeSigma

Sodium hydroxide 1 mol/l (1 N) in aqueous solution, Titripur® Reag. Ph. Eur., Reag. USP volumetric solution, Supelco®

Supplier: Ward's Science

Meets AP Science Practices 2, 4, 5, and 6

Supplier: Honeywell Research Chemicals

Supplier: Ward's Science

CAS Number: 77-09-8
Formula: C20H14O4
Density: 1.299 g/mL
Solubility: Alcohol and Alkalis
Shelf Life: 36 Months

Supplier: Ward's Science

Determine the purity of a soda ash sample via gravimetry and acid-base titration.

Supplier: Ricca Chemical

pH Indicator solution universal pH 2-10

Supplier: Kemtec

Use the Mole Concept to Calculate Various Concentrations of Chemical Solutions.

Supplier: Hach

For determination of alkalinity by Digital Titrator titration.

Supplier: Ward's Science

Meets AP Science Practices 1, 2, 3, 4, 5, and 6

Supplier: Hach

Used for carbon dioxide determination by Digital Titration.

Supplier: Hach

For carbon dioxide determination by Digital Titration.

Supplier: Ward's Science

With this kit, students determine dissolved oxygen concentration without a meter.

Supplier: MilliporeSigma

Supplier: MilliporeSigma

Supplier: BeanTown Chemical

Supplier: MilliporeSigma

Potassium hydroxide 0.1 mol/l (0.1 N) in ethanol, Titripur® volumetric solution, Supelco®

Supplier: Hach

For determination of Chlorine by Digital Titrator titration.

Supplier: Hach

For sequential determination of calcium and total hardness by EDTA digital titrator titration.

Supplier: MilliporeSigma

Hydrochloric acid 0.1 mol/l (0.1 N), Titripur® Reag. Ph. Eur., Reag. USP volumetric solution, Supelco®

Supplier: Hach

For determination of Dissolved Oxygen by Winkler Method Digital Titrator titration. 0.200 N Na2S2O3

Supplier: Hach

For interference removal in several test methods.