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Ammonium is the naturally preferred source of nitrogen for plant growth and there is an increasing global demand for organic food products.

Determinación del amonio en los suelos

En una botella de vidrio, mezcle 50 g de muestra naturalmente húmeda, sin piedras gruesas, con 100 ml de la disolución de cloruro de calcio 0,025 mol/l.

Ammonium in Effluents

Step-by-step method describing the photometric determination of ammonium ions in effluents using Spectroquant® test kits and spectrophotometer.

Ammonium Photometric Determination in Drinking and Surface Water

Photometric determination of ammonium ions in drinking and surface water samples by indophenol blue method using Spectroquant® test kits and spectrophotometer.

Amonio en los efluentes

Método que describe paso a paso la determinación fotométrica de los iones amonio en efluentes utilizando los kits de ensayo y el espectrofotómetro Spectroquant®.

Determination of Ammonium in Compost

Photometric measurement of ammonium ions in compost samples by indophenol blue method using Spectroquant® test kits and spectrophotometer.

Determination of Total Phosphorus in plant materials

Photometric determination of total phosphorus in plant material samples by phosphorus molybdenum blue method using Spectroquant® test kits.

Determination of Chloride in Meat and Sausage Products

Spectrophotometric chloride determination for accurate sodium chloride analysis in meat via using the iron(III)/mercury thiocyanate method.

Analytical Method: COD Measurement in Waste Water (Rapid-Digestion Method)

Analytical Method COD measurement in wastewater - Photometric determination of chromate consumption subsequent to digestion in 20 min.

Método analítico: Medición de la DQO en las aguas residuales (método de digestión rápida)

Método analítico de medición de la DQO en aguas residuales - Determinación fotométrica del consumo de cromatos consecutivo a la digestión en 20 min

Fast and high-resolution Analysis of Intact Therapeutic Monoclonal Antibody Trastuzumab using BIOshell™ A400 Protein C4 Column

Optimization of a Reversed-Phase Liquid Chromatographic (RP-LC) method for the intact analysis of a therapeutic monoclonal antibody, trastuzumab, using a BIOshell™ A400 Protein C4 column.

Analysis of Lactose in Milk by HPLC-RI using Chromolith^® NH2 Column

A new HPLC-RI method is proposed for the analysis of Lactose in milk using a Chromolith® NH2 column.

Assay of Betamethasone Sodium Phosphate by HPTLC

Development of an HPTLC based method, using Silica Gel 60 F254 plate, to determine Betamethasone Sodium Phosphate over a concentration range of 1 to 7 µg/spot.

Analytical Method: Analytical Quality Assurance, Standard for Sulfite

Preparation of a standard solution for Sulfite

Surfactants (nonionic) in Extran^® Rinse Solutions

Learn about the sample preparation and photometric determination of non-ionic surfactants in Extran® rinse solutions (MA 01, MA 02, MA 05, AP 22) using Spectroquant® test kits and spectrophotometers.

Método analítico: Garantía de calidad analítica, patrón para sulfitos

Preparación de una disolución patrón para sulfitos

USP Dissolution Method for Folic Acid

Folic acid vs. folate differences and biological activities; implications in fortified foods and supplements for human health.

Comparison of Granulated and Powdered Dehydrated Culture Media

Microbial culture media is available in both powdered and granulated forms. This article compares the characteristics of each culture media format with regards to safety, handling and convenience.

Comprehensive Quality Assurance and Process Control

Optimize measurement reliability with advanced analytical quality assurance and process control using Spectroquant®, MQuant®, TraceCERT®, and more.

Analytical Method: Analytical Quality Assurance, Standard for Hydrogen peroxide

Preparation of a standard solution for Hydrogen peroxide

Método analítico: Garantía de calidad analítica, patrón para el peróxido de hidrógeno

Preparación de una disolución patrón para el peróxido de hidrógeno

Gabapentin Assay: Ph. Eur. Monograph

LC-MS/MS quantitative method analyzes highly polar 11 nucleotide activated sugars using Supel™ Carbon LC column.

Analytical Method: Analytical Quality Assurance, Standard for Formaldehyde

Preparation of a standard solution for Formaldehyde

Método analítico: Garantía de calidad analítica, patrón para el formaldehído

Preparación de una disolución patrón para el formaldehído

Screening for Estrogen Active Nonylphenols in Water by Planar Solid Phase Extraction – Planar Yeast Estrogen Screen

Nonylphenols (NP) are ubiquitous substances that have been detected in highly diverse foodstuff. As breakdown products of nonylphenol ethoxylates, NP could end up in the aquatic environment. This article presents a rapid method for NP detection in surface water

Analysis of Caffeine and Catechins in Green Tea

Validated HPLC method (based on Ph. Eur. Monograph 2668) for quantifying catechins and caffeine in decaffeinated green tea using a Chromolith® High Resolution RP-18e column with advantages in terms of backpressure and matrix robustness.

Determination of Ammonium in Mineral Fertilizer

Photometric determination of ammonium ions in mineral fertilizer samples by indophenol blue method using Spectroquant® test kits and spectrophotometer.

Determination of Ammonium in Organic Fertilizer

Photometric determination of ammonium ions in organic fertilizers by indophenol blue method using Spectroquant® test kits and spectrophotometer.

Photometric Determination of Ammonium in Manure

Learn about the photometric determination of ammonium ions in manure samples by indophenol blue method using Spectroquant ® test kits and spectrophotometer.

Método analítico: Sulfatos en los materiales de construcción

Determinación fotométrica o turbidimétrica tras extracción en agua agua/fusión

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