Dictionary of Water and Waste Management, Second Edition

I: I and M IWSA

I and M impounding reservoir, i. lake

I and M

Inspection and maintenance.

IAWQ

International Association of Water Quality, which is now included in the International Water Association (IWA).

IBI

Index of biological integrity. See biotic index.

ICAP

ICP.

ICE

Institution of Civil Engineers, Great George Street, London.

ICOLD

The International Commission On Large Dams, and body that is interested in dam engineering and dam safety. See USCOLD.

ICP, ICAP inductively coupled argon plasma emission spectrometry

An analytical technique in which a plasma is generated by an induction coil operating at frequencies of 4 to 50 MHz. The oscillating magnetic field induces an electron and ion current which generates a temperature of 6000 C or more in the argon gas that is flowing through the induction coil. A sample is introduced into the plasma. At the high temperatures, the compounds in the sample are broken down into excited atoms, many of which emit light. The wavelength of the emitted light can be analysed allowing simultaneous analysis of a wide range of elements, particularly the metallic elements. This is known as ICP-OES (optical emission spectroscopy).

ICP-MS

The use of ICP to generate ions that are then analysed by mass spectrometry.

ICR

In the USA, ignitable, corrosivity, and reactivity of a hazardous waste.

ICRCL

Interdepartmental Committee on the Redevelopment of Contaminated Land.

ICRP

International Commission for Radiation Protection.

ID50, infective dose 50%

The concentration of the pathogen at which 50% of the organisms or animals,...

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