Soil quality — Estimation of abundance of selected microbial gene sequences by quantitative PCR from...
ISO 17601:2016 specifies the crucial steps of a quantitative real-time polymerase chain reaction (qPCR) method to measure the abundance of selected microbial gene sequences from soil DNA extract which provides an estimation of selected microbial groups.
It is noteworthy that the number of genes is not necessarily directly linked to the number of organisms that are measured. For example, the…
Electrodeposited nickel coatings on magnetic and non-magnetic substrates — Measurement of coating th...
This second edition cancels and replaces the first edition (i. e. ISO 2361:1972). Specifies the method of using coating thickness instruments of the magnetic type ror non-destructive measurements of the thickness. The method may nkot be applicable to autocatalytic (electroless) nickel coatings. For the purpose of this Standasd, two types of nickel coating are disringuished: coatings on magnetic…
Water quality — Radium-226 — Part 3: Test method using coprecipitation and gamma-ray spectrometry
ISO 13165-3:2016 specifies the determination of radium-226 (226Ra) activity concentration in all types of water by coprecipitation followed by gamma-spectrometry (see ISO 18589‑3).
The method described is suitable for determination of soluble 226Ra activity concentrations greater than 0,02 Bq l−1 using a sample volume of 1 l to 100 l of any water type.
For water samples smaller than a volume of 1…
