Wet chemical analysis

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Sigma-Aldrich.com presents an article on Selectophore Ionophores

Enzymatic Method for Determining Branched Chain Amino Acids (BCAA Assay)

Assay protocol for the colorimetric detection of Branched Chain Amino Acids (BCAA) in biological samples using the alanine assay kit.

Electrochemistry on the Bench and in the Field

Nanomaterials, electrochemistry, BASi, LIB, Lithium Ion Batteries, reference electrode, Teflon, silver nitrate, working electrodes, counter electrode, organic electrosynthesis

Identification of Cell Culture Media with Raman Spectroscopy

Identification of cell culture media samples by traditional LC methods, such as amino acid or vitamin analysis, has high costs, and requires significant analytical expertise and laboratory space.

How to Select the Right Water Purification System for Your Lab

Technical article on Selecting the Right Water Purification System

Calculating Your Working Tolerance: A Guideline

Guideline to calculate your working tolerance - Certified Standard Solutions (CRM)

Analytical Method: Urea in Water and Wastewater, Enzymatic Determination

Urea in water and wastewater, enzymatic determination - Photometric determination using the indophenol blue method after cleavage of the urea

Measuring Chemical Oxygen Demand in Water Treatment Facilities

We are a global leader in the life science industry and have produced test kits to measure numerous analytes. Water Online spoke with us about advances in measuring chemical oxygen demand.

Water for BOD & COD Oxygen Demand Testing

Learn about the importance of lab water quality on Chemical Oxygen Demand (COD) and Biochemical (or Biological) Oxygen Demand (BOD) testing in water and wastewater analysis. Find in-depth guidance to establish the optimal lab water solution for your environmental and

Cannabis Potency Testing: Method Development and Cost Considerations

An overview of gradient HPLC-based analysis of cannabinoids, optimized for key method parameters such as column temperature, mobile phase pH, and methanol as low-cost organic modifier. Learn more here.

Determination of Phospholipid Oxidation by UV/VIS Spectroscopy - Avanti® Polar Lipids

The percent oxidation of a phospholipid can be determined by using Beer’s Law to calculate the peroxidized phospholipid’s concentration from its absorbance at 234 nm.

Transmittance to Absorbance Table

Transmittance to absorbance table for fast conversion. Use this chart as a handy reference in the lab, classroom or field. The online transmittance chart is available to download and share.

Safe Drinking Water Act & Clean Water Act – What is it?

The Safe Drinking Water Act reflects the primary drinking water regulation. Drinking water here means finished drinking water from the plant and the distribution lines. But the Safe Drinking Water Act covers also the ground water sources for raw water

Phosphate in Groundwater and Surface Water: A Rapid and Reliable Determination Method using the Photometric Spectroquant® Test

The analysis of low concentrations of PO4-P in natural, uncontaminated waters is often challenging. The Spectroquant® photometric test provides an easy-to-use and sensitive method for quantification with results comparable to DIN EN ISO 6878.

Sensitive Determination of Iron in Drinking Water, Mineral Water, Groundwater, and Spring Water Using Rapid Photometric Tests

Spectroquant® Iron Test - a suitable alternative to ICP or AAS for determination of iron in drinking water, mineral water, groundwater, and spring water.

An Easier, Faster, and Cost-Effective Option for Measuring Total Nitrogen

This total nitrogen test kit is faster, safer, more accurate and costs less than the traditional method. The Total Nitrogen Analysis test kit was developed to provide users with a single test method for determining total nitrogen levels in process

Importance of Volumetric Solution Standardization

The titer determination or standardization of a titration solution is essential for accurate and reliable titration results.