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2271 risultati per "MACHEREY-NAGEL"

2271 Risultati per: "MACHEREY-NAGEL"

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HMDS (1,1,1,3,3,3-Esametildisilazano) silylation reagent, for GC derivatisation

HMDS (1,1,1,3,3,3-Esametildisilazano) silylation reagent, for GC derivatisation

Supplier: MACHEREY-NAGEL

HMDS is weak TMS donor. If used as sole reagent, it is slow and not very effective. After addition of catalytic quantities (e.g., 1 %) of TMCS or as a mixture with TMCS it is a fast and quantitative reagent for trimethylsilylation of organic compounds.

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N-Methyl-N-trimethylsilylheptafluorobutyramide (MSHFBA) silylation reagent, for GC derivatisation

N-Methyl-N-trimethylsilylheptafluorobutyramide (MSHFBA) silylation reagent, for GC derivatisation

Supplier: MACHEREY-NAGEL

Silylation reagent with recommended applications: carboxylic acids, alcohols, phenols, primary and secondary amines and amino acids.

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N,N-Dimetilformammide dimetil acetale methylation reagent, for GC derivatisation

N,N-Dimetilformammide dimetil acetale methylation reagent, for GC derivatisation

Supplier: MACHEREY-NAGEL

Methylation with DMF-DMA can be applied for fatty acids, primary amines and partially amino acids forming N-dimethyl-aminomethylene amino acid methyl esters. DMF-DMA is a poor solvent, for this reason it is necessary to use a mixture of DMF-DMA with pyridine, THF, acetone (barbiturates) or another solvent.

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N-Methyl-bis-heptafluorobutyramide (MBHFBA) acylation reagent, for GC derivatisation

N-Methyl-bis-heptafluorobutyramide (MBHFBA) acylation reagent, for GC derivatisation

Supplier: MACHEREY-NAGEL

Acylation with fluorinated bisacylamides is recommended for alcohols, primary and secondary amines as well as for thiols under mild, neutral conditions.

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SPE columns, CHROMABOND® C2

SPE columns, CHROMABOND® C2

Supplier: MACHEREY-NAGEL

CHROMABOND® C2 is a dimethyl modified silica phase for SPE.

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SPE columns, hydrocarbons analysis, CHROMABOND® Na₂SO₄/Florisil®

SPE columns, hydrocarbons analysis, CHROMABOND® Na₂SO₄/Florisil®

Supplier: MACHEREY-NAGEL

CHROMABOND® Na₂SO₄/Florisil® is a combination phase for SPE of hydrocarbons from water.

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Glass microfiber filters with organic binder, grade MN 85/220

Glass microfiber filters with organic binder, grade MN 85/220

Supplier: MACHEREY-NAGEL

MN 85/220 is a thick glass fiber paper with high basis weight for the filtration of large volumes of liquids.

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Inserts for screw neck vials, N 13

Inserts for screw neck vials, N 13

Supplier: MACHEREY-NAGEL

Vial insert, 0,30 ml, Vetro, trasparente, Ø×A: 6×40 mm, Fondo conico, Non sterili, Cap included: No

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HPTLC plates, silica gel 60, unmodified layers, Nano-ADAMANT

HPTLC plates, silica gel 60, unmodified layers, Nano-ADAMANT

Supplier: MACHEREY-NAGEL

Unmodified HPTLC silica layers available as glass plates with or without fluorescent indicator. The narrow fractionation of the silica particles features theoretical plate heights, which are one order of magnitude smaller than on standard silica layers. Thus, Nano-ADAMANT has the advantage of sharper separations, shorter developing times, and increased detection sensitivity with equal selectivity.

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Test strips, qualitative, chromium

Test strips, qualitative, chromium

Supplier: MACHEREY-NAGEL

This test paper allows the quick and easy detection of chromate (CrO₃-). Cr(III) ions must be converted to Chromate prior to the detection.

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TLC indicators

TLC indicators

Supplier: MACHEREY-NAGEL

Fluorescent indicators for thin layer chromatography.

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SPE columns, CHROMABOND® HR-XC

SPE columns, CHROMABOND® HR-XC

Supplier: MACHEREY-NAGEL

CHROMABOND® HR-XC is a benzenesulfonic acid modified polymeric cation exchanger for SPE.

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HPLC columns, PAH analysis, NUCLEODUR® C18 PAH

HPLC columns, PAH analysis, NUCLEODUR® C18 PAH

Supplier: MACHEREY-NAGEL

Special octadecyl modified silica phase for HPLC analysis of PAHs.

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SPE columns, CHROMABOND® HR-XAW

SPE columns, CHROMABOND® HR-XAW

Supplier: MACHEREY-NAGEL

CHROMABOND® HR-XAW is a weakly basic secondary and tertiary ammonium polymeric anion exchanger for SPE.

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Cellulose chromatography papers

Supplier: MACHEREY-NAGEL

Paper chromatography is the chromatographic technique separation due to partition of the analytes between special paper grades and the mobile phase, which penetrates the paper by capillary action ascending, descending and circular techniques are possible.

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NANOCOLOR® Photometric Standard Test Kit for Phenol

NANOCOLOR® Photometric Standard Test Kit for Phenol

Supplier: MACHEREY-NAGEL

Photometric test kit for the determination of phenols in water samples.

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SPE columns, PAH analysis, CHROMABOND® CN/SiOH

SPE columns, PAH analysis, CHROMABOND® CN/SiOH

Supplier: MACHEREY-NAGEL

CHROMABOND® CN/SiOH is a combination phase for SPE analysis of PAHs.

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Septa for screw caps, N 13

Septa for screw caps, N 13

Supplier: MACHEREY-NAGEL

Septa, PTFE virginal, white, Durezza: 53° shore D, Spessore: 0,25 mm, Ø: 12 mm

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Capillary columns, OPTIMA WAXplus®

Supplier: MACHEREY-NAGEL

Polar GC phase with optimized crosslinking for lower column bleeding and higher temperature stability

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QUANTOFIX Iron Sensitive 1

QUANTOFIX Iron Sensitive 1

Supplier: MACHEREY-NAGEL

Semi-quantitative test strips for reliable determination of iron concentrations as low as 0.05 mg/L (ppm). A hole in the plastic carrier allows the water to migrate through the test pad increasing the sensitivity by a factor of nearly 10. Ideal for rapid and easy analysis of iron directly on-site. No maintenance or calibration is required.

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Capillary columns, OPTIMA® 1701 MS

Capillary columns, OPTIMA® 1701 MS

Supplier: MACHEREY-NAGEL

Medium polar silarylene GC phase with low bleeding.

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HPLC columns, NUCLEODUR® PFP

HPLC columns, NUCLEODUR® PFP

Supplier: MACHEREY-NAGEL

NUCLEODUR® PFP is a pentafluorophenyl-propyl modified silica phase for HPLC.

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Capillary columns, OPTIMA® 1301 MS

Capillary columns, OPTIMA® 1301 MS

Supplier: MACHEREY-NAGEL

Medium polar silarylene GC phase with low bleeding.

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Guard column holder for preparative HPLC columns, VarioPrep

Guard column holder for preparative HPLC columns, VarioPrep

Supplier: MACHEREY-NAGEL

VarioPrep (VP) guard column holders are needed for the installation of VP guard columns at VP preparative HPLC columns.

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SPE columns, acrylamide analysis, CHROMABOND® Carbon A

SPE columns, acrylamide analysis, CHROMABOND® Carbon A

Supplier: MACHEREY-NAGEL

CHROMABOND® Carbon A is a special phase for SPE enrichment of acrylamide from water.

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Accessories for electronic crimping tools

Supplier: MACHEREY-NAGEL

Rack for 2 electronic crimping tools

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Qualitative filter papers, grade MN 617 wa

Supplier: MACHEREY-NAGEL

These papers are made hydrophobic (impermeable to water) by impregnation with a silicone. With the aid of these filters, water can be separated from water-immiscible organic solvents in an elegant manner, by means of a simple filtration.

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Colorimetric rapid tests, cyanide, VISOCOLOR®

Colorimetric rapid tests, cyanide, VISOCOLOR®

Supplier: MACHEREY-NAGEL

The VISOCOLOR® testkits are devided into VISOCOLOR® alpha, ECO and HE. Every product range offering its specific strenght to provide a tailored test for each and every user and application.

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Colorimetric rapid tests, hydrazine, VISOCOLOR® ECO

Colorimetric rapid tests, hydrazine, VISOCOLOR® ECO

Supplier: MACHEREY-NAGEL

Colorimetric determination of hydrazine by DIN method: In acidic solution hydrazine reacts with 4-dimethylaminobenzaldehyde to form a yellow/orange colored compound. (Reaction basis according to DIN 38413-P1)

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Titrimetric and colorimetric rapid tests, oxygen, VISOCOLOR®

Titrimetric and colorimetric rapid tests, oxygen, VISOCOLOR®

Supplier: MACHEREY-NAGEL

The VISOCOLOR® testkits are devided into VISOCOLOR® alpha, ECO and HE. Every product range offering its specific strenght to provide a tailored test for each and every user and application.

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