Fentiman’s Toxic Legacy

After two years of misinformation, deceit and outright lies, fake “Cambridge graduate microbiologist” Rick Fentiman has to admit that his Deprox process leaves hospital rooms and equipment contaminated with highly toxic silver nitrate dust. A recent investigation at the University College London NHS Trust revealed the following figures:

  • Silver Nitrate content of Deproxin solution: 10 – 25mg/l
  • Silver Nitrate deposited on room surfaces after a single cycle: 1.5 – 2.5mg/m2

An independent test of the same parameters by Butterworth gave similar results:

  • (Deproxin) Silver expressed as Ag (by Plasma Emission Spectroscopy) 51.0mg/l
  • (Deproxin) Nitrate expressed as NO(by ion chromatography)  35.1mg/l

Surface deposits after single cycle:

  • (Surface) Silver expressed as Ag (by Plasma Emission Spectroscopy) 2.5mg/m2
  • (Surface) Nitrate expressed as NO(by ion chromatography) 1.8mg/m2

Silver nitrate is persistent in the environment, and will build up cumulatively each time a room is processed. The permitted level of silver nitrate dust in the air is vanishingly small. The legal maximum is 0.01mg/m³ –  250 times this amount of the chemical is deposited on each square metre of surface per process! 

This presents a particular danger to hospital staff making up the bed after a Deprox process – laying down the mattress and placing sheets will disturb clouds of the fine dust at very hazardous levels. Staff should certainly be provided with appropriate respiratory equipment for this task, and silver nitrate dust levels should be monitored before readmitting patients. 

Rooms that have become heavily contaminated by multiple processes may need decontaminating by Hazchem professionals.

Silver Nitrate deposits at the Royal Liverpool Hospital

capture

Isolation rooms at the Royal Liverpool University Hospital have become so heavily contaminated with silver nitrate that patients have complained, mistaking the black deposits on the windows for dirt. Director of nursing Lisa Grant admitted that the Hydrogen Peroxide Vapour (HPV) bio-decontamination system leaves a “sterile residue” but was apparently unaware that it is silver nitrate. The photo above was submitted to The Liverpool Echo by a patient who attempted to remove the chemical with a tissue. There is enough silver nitrate on the tissue to cause unpleasant chemical burns to the skin. Even more seriously, the AgNO3 dust levels in the room must have been far in excess of the legal maximum, which is an invisibly small 0.01mg/m³ – that’s 1/100,000th of a gram per cubic metre of air.

Rick Fentiman

Rick Fentiman claims to be a "Cambridge graduate microbiologist"

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