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Supplier: VWR Chemicals
Description:

Indicator tablets for determination of water hardness by titration with EDTA.

Specifications
Minimum weight: ≥ 0.20 g
Maximum weight: ≤ 0.23 g
Disintegration time (at 25°C): ≤ 150 s
Application test: conforms

The tablets are dissolved in 100 ml of the water sample to be tested, which has been buffered at pH 10 with 1 ml of Ammonia/ Ammonium chloride buffer solution, and then titrated with EDTA solution (0,01 M) till the sample turns from red to blue.
Total hardness in mg/l = 10×ml of titrant used.

Control samples of  calcium carbonate should be used to calibrate the method.

MSDS Certificates New Product

Supplier: MP Biomedicals
Description: Neuraminidase (Sialidase: Acylneuraminyl hydrolase; EC 3.2.1.18) From Arthrobacter ureafaciens lyophilised powder with salts. The salts are composed of sodium-potassium phosphate to give a solution of 10 mM phosphate buffer (pH 7) when enzyme is reconstituted with water to make activity of 1 unit per ml. Activity: >60 units/mg protein for NAN-lactose >25 units/mg protein for bovine submaxillary mucin >20 units/mg protein for colominic acid Protein is determined by the method of Lowry et al. with bovine albumin as a standard.6 Unit definition: One unit will liberate 1,0 µmole of N-acetyl-neuraminic acid (NANA) per minute at pH 5,0 at 37 °C, using either one NAN-lactose, bovine submaxillary mucin, or colominic acid as a substrate.

Catalog Number: (PIER23229)
Supplier: Thermo Fisher Scientific
Description: The Compat-Able™ Reagents remove salts, detergents, reducing agents and other substances from protein samples to eliminate interference with protein assays. The protocol selectively precipitates all of the protein, thereby allowing the non-protein components to be easily decanted and removed. The purified, precipitated protein is redissolved in water, making it ready for accurate determination of the protein concentration by standard protein assay methods. The procedure is accomplished in less than 10 min with just a few simple steps. The Compat-Able™ Preparation Set is available conveniently bundled with the Pierce BCA™ Protein Assay Kit.
UOM: 1 * 1 KIT


Catalog Number: (90243-100ML)
Supplier: Merck
Description: Multi-element standard solution 1 has been used in the analysis of pollutants like trace elements in water using total reflection x-ray fluorescence (TXRF) method and inductively coupled plasma mass spectrometry(ICP-MS).
UOM: 1 * 100 mL

Supplier: VELP SCIENTIFIC
Description: The FP4, FC S, and JLT Series assist laboratory technicians in the environmental sector by providing tools for conducting the jar test and leaching test, which are essential for water treatment and environmental protection. These tests help determine the most effective methods for improving water quality and assessing the potential environmental risks posed by pollutants.

Catalog Number: (45634-50MG)
Supplier: Merck
Description: Promecarb may be used as a reference standard for the determination of promecarb in water by solid-phase extraction and liquid chromatography coupled with ionspray mass spectrometry.
UOM: 1 * 50 mg


Catalog Number: (44189-50MG)
Supplier: Merck
Description: Isoamyl 4-methoxycinnamate may be used as a reference standard in the determination of isoamyl 4-methoxycinnamate in water samples using liquid chromatography coupled with ultraviolet spectrophotometry detector (LC-UV).
UOM: 1 * 50 mg


Supplier: Merck
Description: Chlorite IC standard may be used in the determination of disinfection by-product, chlorite in water samples using ion chromatography technique (IC)
Catalog Number: (94685-500ML)
Supplier: Merck
Description: Vanadate-molybdate reagent can be prepared by dissolving ammonium molybdate and ammonium vanadate in distilled water along with concentrated nitric acid.
UOM: 1 * 500 mL

Catalog Number: (28672.294)
Supplier: VWR Chemicals
Description: Determination of oxygen or free chlorine
UOM: 1 * 1 L

Supplier: Thermo Orion
Description: The metallic redox/ORP electrodes can be used to make direct measurements of redox potentials or to perform potentiometric titrations. The double platinum Orion™ combination electrode is designed for performing accurate Karl Fischer titrations.

Catalog Number: (39116-10MG)
Supplier: Merck
Description: The tricyclazole CRM may also find the following uses: Determination of tricyclazole content in paddy rice using sliver colloid as a substrate and pyridine as an internal standard by surface-enhanced Raman spectroscopy (SERS). To detect residues of tricyclazole and thiram in pear fruit extracts using SERS. Dissipation studies of penoxsulam tricyclazole and profoxydim in rice paddy systems using HPLC-Diode Array Detection (DAD). Determination of tricyclazole residues in rice using liquid chromatography-tandem mass spectrometry (LC-MS/MS) along with the QuEChERS method of sample preparation. Degradation of tricyclazole (TC) in an aqueous solution and real pesticide industry wastewater (RPW) by electron beam (EB) radiation.
UOM: 1 * 10 mg


Catalog Number: (160204A)
Supplier: VWR Chemicals
Description: Ideal for hardness of water determination.
UOM: 1 * 1 L

Catalog Number: (SCOI285216650)
Supplier: SI Analytics
Description: Generating electrode with diaphragm
UOM: 1 * 1 items


Catalog Number: (99566.180)
Supplier: VWR Chemicals
Description: Pure Water viscosity standard have certified data for kinematic viscosity, dynamic viscosity and density at 5, 20, 25 and 37 °C.
UOM: 1 * 100 mL

Catalog Number: (30988-50MG)
Supplier: Merck
Description: The flutolanil CRM may also find following uses: Examine the reproductive endpoints on the gonad endocrine system of the parental zebrafish after chronic exposure to different concentrations of flutolanil for 60 days. Spectroscopic analysis of acetamiprid flutolanil and etofenprox residues extracted from tomato fruits. Development and validation of two robust chromatographic methods for estimation of tomatoes specific acetamiprid flutolanil and etofenprox residues on fruits before food processing and serving. To investigate the developmental toxicity and the potential mechanism of thyroid endocrine disruption induced by flutolanil in zebrafish embryos based on H¹ NMR metabolomics analysis. To develop a sensitive LC-MS/MS analytical method for the determination of residual flutolanil and its principal metabolites and conjugates in livestock and seafood products.
UOM: 1 * 50 mg


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Stock for this item is limited, but may be available in a warehouse close to you. Please make sure that you are logged in to the site so that available stock can be displayed. If the call is still displayed and you need assistance, please call us on +353 1 88 22222.
Stock for this item is limited, but may be available in a warehouse close to you. Please make sure that you are logged in to the site so that available stock can be displayed. If the call is still displayed and you need assistance, please call us on +353 1 88 22222
This product is marked as restricted and can only be purchased by approved Shipping Accounts. If you need further assistance, email VWR Regulatory Department at eurega_services@eu.vwr.com
-Additional Documentation May be needed to purchase this item. A VWR representative will contact you if needed.
This product has been blocked by your organisation. Please contact your purchasing department for more information.
The original product is no longer available. The replacement shown is available.
Product(s) marked with this symbol are discontinued - sold till end of stock. Alternatives may be available by searching with the VWR Catalog Number listed above. If you need further assistance, please call VWR Customer Service on +353 1 8822222.
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