Ministry Blunders Again Over Dioxin Blood Testing
T James Sprott OBE --- 10 Combes Road
MSc PhD FNZIC --- Remuera
Consulting Chemist --- Auckland 5
Forensic Scientist --- NEW ZEALAND
Phone & Fax: 64-9-5231150 sprott@iconz.co.nz
16 February 2001
MEDIA RELEASE
SPROTT: MINISTRY OF HEALTH BLUNDERS AGAIN OVER BLOOD TESTING FOR DIOXINS AT NEW PLYMOUTH
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Dr Jim Sprott has drawn attention to a major fallacy in the Ministry of Health's rationale for blood testing of New
Plymouth residents to determine levels of dioxin in the body.
The Ministry stated yesterday that blood testing would reliably indicate dioxin levels accumulated by New Plymouth
residents, because blood contains fat into which dioxins are absorbed and total body burden of dioxin could be
calculated from the concentration in blood fat.
This reasoning by the Ministry is fallacious with respect to the New Plymouth situation.
While blood testing may be useful to gauge exposure to present ambient levels of dioxin, blood testing is quite
ineffective to assess long-term accumulation of dioxin in people who have had prolonged exposure to the chemical.
"The Ministry is quite right that there is fat in blood", said Dr Sprott. "But blood fat is not the fat in which dioxin
from long-term exposure is accumulated. Long-term exposure to dioxin results in accumulation in adipose fat tissue, and
adipose fat is not re-distributed into the blood."
"Therefore, blood testing is a very unreliable method of assessing dioxin levels in residents who may have been exposed
for decades to high levels of dioxin sourced from the Ivon Watkins-Dow plant."
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