Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Thomas J. Brock is a CFA and CPA with more ...

The most common issues refineries and petrochemical plants face with process sampling, unrepresentative samples, frequent repairs and unsafe operator conditions, can be addressed by following these ...

Acceptance sampling and process capability form two pillars of statistical quality assurance, guiding decisions on whether to accept production lots and assess the stability and conformity of ...

A recent article explained the role of Gas Chromatography-Mass Spectrometry (GC/MS) in the analytics laboratory. The current article focuses on reviewing the technology used for preparing volatile ...

Material selection is seldom as easy as pulling an available tube from the stock room. Good sample transport system design incorporates various factors in material selection. These include surface ...

In performing air sampling in the field, the first step is to assemble a sampling train consisting of a calibrated personal sampling pump connected by a piece of plastic tubing to the collection media ...

Sampling is a technique in which samples are drawn at random (without any favor or bias). For this, suitable measures or procedures may be laid down and adopted according to the nature and ...