We specialize in providing nitrogen anoxia bubble and chamber treatment for museum integrated pest management. An ecological, user-friendly insect disinfestation method, this process has neither noxious secondary effects nor involves any risk to the health of operators or users. It uses an inter gas, usually nitrogen, which causes death of the insects by asphyxia and dehydration. Anoxia treatment eliminates the infesting insects at any stage of their development. The disinfestation process takes place in Micrographics Data’s Anoxia Chamber, which has been specifically designed to deal with valuable books, documents and works of art.
Nitrogen (N2) gas is used in controlled atmospheres are effective in causing insect death within 2-6 weeks, as shown by measuring insect respiration before and after treatment. For Nitrogen/Argon treatment to work, the oxygen levels are reduced to 0.1-0.3%. The oxygen deprivation causes a disruption in the glucose production within insect bodies, resulting in weight loss and eventual insect death. Rates of death vary with temperature, relative humidity, exposure time, and species type. Increasing the temperature helps reduce the exposure time for both gases because insect respiration is increased with higher temperature, causing rapid water loss. (Valentín 1993). Argon is 25-50% faster than nitrogen at killing insects. Additionally, argon kills some fungal tissue while nitrogen permits the same fungi to survive anoxia (Koestler, Tavzes, Pohleven 2004). Modified atmospheres using nitrogen and argon are usually continuous-flow systems with soft or hard walled, vapor impermeable chambers. The continuous flow of gas initially purges the chamber of oxygen, and then maintains low oxygen levels to compensate for leaks.
Almost all collections can be treated with nitrogen or argon. Exceptions include:
An anoxic atmosphere requires an enclosure, gas, and gas monitoring devices. Uses low-oxygen gas (less then 1000ppm of O2). Enclosures must be constructed of vapor impermeable materials such as and polypropylene films.