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19 matches found for NaOH

HPLC Analysis of Voriconazole With Basic Stress on Chromolith Performance 100-3mm

sample preparation stirring 0.5 hour in NaOH 0.1N column Chromolith® Performance 100 x 3 mm (1.52001.0001) column temp. ambient mobile phase [A] acetonitrile; [B] water; (50:50, A:B) flow rate 425 μL/min pressure 4032 psi (28 bar) sample Voriconazole 50 μg/mL injection 5 μL detector 256 nm cell: 1.4...

HPLC Analysis of Voriconazole With Basic Stress on Chromolith Performance 100-2mm

sample preparation stirring 0.5 hour in NaOH 0.1N column Chromolith® Performance 100 x 2 mm (1.52006.0001) column temp. ambient mobile phase [A] acetonitrile; [B] water; (50:50, A:B) flow rate 190 μL/min pressure 302 psi (21 bar) sample Voriconazole 50 μg/mL injection 2 μL detector 256 nm cell: 1.4 ...

HPLC Analysis of Voriconazole With Basic Stress on Chromolith Performance 100-4.6 mm

sample preparation stirring 0.5 hour in NaOH, 0.1N column Chromolith® Performance 100 x 4.6 mm (1.52028.0001) column temp. ambient mobile phase [A] acetonitrile; [B] water; (50:50, A:B) flow rate 1 mL/min pressure 4758 psi (33 bar) sample Voriconazole 50 μg/mL injection 20 μL detector 256 nm cell: 1...

GC Analysis of Tricyclic Antidepressants in Urine on a 100%Methyl Column after SPME using 100 μm PDMS Fiber

sample/matrix 1 mL urine (1 mug each analyte + 50 µL 5 M NaOH) in 7.5 mL vial desorption process 3 min, 280 °C extraction headspace, 15 min, 100 °C (sample incubated 30 min) SPME fiber polydimethylsiloxane, 100 µm (57300-U) column 100% methyl polysiloxane, 30 m x 0.32 mm I.D., 0.25 µm (Supelco equiv...

HPLC Analysis of a Synthetic Oligonucleotide on TSKgel® SuperQ-5PW

column TSKgel SuperQ-5PW, 7.5 cm x 7.5 mm I.D., 10 μm particles (818257) mobile phase [A] 10 mM NaOH; [B] 10 mM NaOH, 1 M NaCl gradient 0 to 50% B in 40 min; to 100% B in 1 min; held for 5 min flow rate 1 mL/min sample 16-mer morpholine oligonucleotide, AAG AAG AAG AGG GGA G injection 0.5 O.D. (opti...

HPLC Analysis of Lysozyme in Cheese on Chromolith® High Resolution RP-18e

sample preparation 2g of homogenized hard cheese, add 20mL 1M NaCl solution in 100mL beaker and adjust to pH=6 with 0.1M NaOH,stir for 5min at 1200rpm, transfer the solution to another 100mL beaker and rinse old beaker with 10mL 1M NaCl solution. Stir one hour on a magnetc stirrer. (Adjust to pH=4.3...

HPLC Analysis of Proteins by Immobilized Metal Ion Affinity Chromatography on TSKgel® Chelate-5PW

column TSKgel Chelate-5PW, 5 cm x 5 mm I.D., 10 µm particles (column saturated with Zn2+ ions) (814440) mobile phase [A] 20 mM HEPES, 0.5 M sodium chloride, 1 mM imidazole, pH 8 with sodium hydroxide; [B] 20 mM HEPES, 0.5 M sodium chloride, 20 mM imidazole, pH 8 with sodium hydroxide gradient 30 min...

HPLC Analysis of Folic Acid Syrup on Chromolith High Resolution RP-18

sample preparation Pipette out 15 ml of syrup in 50 ml volumetric flask. Add diluent to make up the volume.Sonicate for 30 min. Fiter through 0.2 μm filter paper. column Chromolith High Resolution RP-18 endcapped, 100 x 4.6 mm (1.52022.0001) column temp. 30 °C mobile phase [A] 1.5 g of hexane 1-sulf...

Analytical Method: Analytical Quality Assurance, Standard for Iodine

Reagents: Cat.No. 102404 Potassium iodate volumetric standard Cat.No. 105043 Potassium iodide for analysis Cat.No. 109072 Sulfuric acid 0.5 mol/l Cat.No. 109136 Sodium hydroxide solution 2 mol/l Cat.No. 116754 Water for analysis Preparation of a KlO3 stock solution: Dissolve 1.005 g of KlO3 in 250 m...

Determination of Dehydroacetic acid in Bread using HPLC with UV detection following the Chinese National Standard (GB) Method

Dehydroacetic acid is an organic compound which has several industrial applications. It can be used as a plasticizer in synthetic resins; as a fungicide or bactericide; but also as a food preservative (E265). This application focus on testing Dehydroacetic acid in bread using a Discovery® HS C18 HPL...

Analytical Method: Platinum in water and wastewater

Instruments: Cat.No. 173016 Spectroquant® VIS Spectrophotometer Prove 100 or Cat.No. 173017 Spectroquant® UV/VIS Spectrophotometer Prove 300 or Cat.No. 173018 Spectroquant® UV/VIS Spectrophotometer Prove 600 or Cat.No. 109748 Spectroquant® Photometer NOVA 30 or Cat.No. 109751 Spectroquant® Photomete...

Analytical Method: Boron in silicon tetrachloride

Instruments and Reagents: Cat.No. 173016 Spectroquant®VIS Spectrophotometer Prove 100 or Cat.No. 173017 Spectroquant® UV/VIS Spectrophotometer Prove 300 or Cat.No. 173018 Spectroquant® UV/VIS Spectrophotometer Prove 600 or Cat.No. 109748 Spectroquant® Phometer NOVA 30 or Cat.No. 109751 Spectroquant®...

Analytical Method: Analytical Quality Assurance, Standard for Chlorine dioxide

Reagents: Cat.No. 102404 Potassium iodate, volumetric standard Cat.No. 105043 Potassium iodide for analysis Cat.No. 109072 Sulfuric acid 0.5 mol/l Cat.No. 109136 Sodium hydroxide solution 2 mol/l Cat.No. 116754 Water for analysis Preparation of a KlO3 stock solution: Dissolve 1.005 g of KlO3 in 250 ...

Analytical Method: Analytical Quality Assurance, Standard for Ozone

Reagents: Cat.No. 102404 Potassium iodate volumetric standard Cat.No. 105043 Potassium iodide for analysis Cat.No. 109072 Sulfuric acid 0.5 mol/l Cat.No. 109136 Sodium hydroxide solution 2 mol/l Cat.No. 116754 Water for analysis Preparation of a KlO3 stock solution: Dissolve 1.005 g of KlO3 in 250 m...

Application Notes Reflectometry – Sulfite in Dried Fruits

Related Products • Test Strips and Visual Tests • Reflectoquant® Instruments & Test Kits • Visual Test & MQuant® Test Strips • pH Indicator Tests • Spectroquant® Prove Spectrophotometers • Spectroquant® Test Kits • Water, Food & Environmental Analytics Catalog Related Content • Application Notes for...

Analytical Method: Analytical Quality Assurance, Standard for Free Chlorine (DIN)

Reagents: Cat.No. 102404 Potassium iodate volumetric standard Cat.No. 105043 Potassium iodide for analysis Cat.No. 109072 Sulfuric acid 0.5 mol/l Cat.No. 109136 Sodium hydroxide solution 2 mol/l Cat.No. 116754 Water for analysis Preparation of a KlO3 stock solution: Dissolve 1.006 g of KlO3 in 250 m...

Analytical Method: Analytical Quality Assurance, Standard for Bromine

Reagents: Cat.No. 102404 Potassium iodate, volumetric standard Cat.No. 105043 Potassium iodide for analysis Cat.No. 109072 Sulfuric acid 0.5 mol/l Cat.No. 109136 Sodium hydroxide solution 2 mol/l Cat.No. 116754 Water for analysis Preparation of a KlO3 stock solution: Dissolve 1.005 g of KlO3 in 250 ...

Analytical Method: Palladium in water and waste water

Instruments and Reagents: Cat.No. 173016 Spectroquant® VIS Spectrophotometer Prove 100 or Cat.No. 173017 Spectroquant® UV/VIS Spectrophotometer Prove 300 or Cat.No. 173018 Spectroquant® UV/VIS Spectrophotometer Prove 600 or Cat.No. 109751 Spectroquant® Photometer NOVA 60 Cat.No. 106268 Sodium acetat...

UHPLC Analysis of Riboflavin and Impurities on Titan™ C18 with MS Detection

column Titan C18, 10 cm x 2.1 mm I.D., 1.9 µm particles (577124-U) column temp. 35 °C mobile phase [A] 0.1% formic acid in water; [B] 0.1% formic acid in acetonitrile (95:5) gradient 5% to 25% in 6 min, return to 5% b in 0.1 min, and re-equilibrate for 4 min flow rate 500 µL/min pressure 5000 psi (3...