Water quality. Determination of polycyclic aromatic hydrocarbons (PAH) - Determination of six PAH by high performance thin layer chromatography with fluorescence detection after liquid-liquid extraction1 Scope This part of ISO 7981 specifies the determination of six selected PAH in drinking water by high performance thin layer chromatography with fluorescence detection after liquid liquid extraction. The six PAH are: fluoranthene, benzo[b]fluoranthene, benzo[a]pyrene, benzo[k]fluoranthene, indeno[1,2,3 cd]pyrene, and benzo[ghi]perylene (see Table 1). A screening method (method A) is described to exclude those samples containing less than 20 % of the

BS EN 4346  on Vacuum induction melted steel for aerospace application is useful for:

The revision brings many technologies and processes up to date

countermeasures need to be incorporated into the security plan to reduce the threat to an acceptable level

nor to its characteristics (speeds

Organizations installing lifts

Bluetooth enabled devices

The Braille cell

which is filled with untreated geothermally heated water)

Requirements for resuscitator

Who is ISO 11591 for

in particular those covered in the EN 81 series

What does ISO 13053