Introduction
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Why detect?
There are two possible reasons that lead were found in recycled oil. One is that the animal feed oil is made from animal’s internal organs, and those organs are to conduct metabolism in animal’s bodies, so they may contain little lead. The other is that the oil container is made of metals like lead, and it may dissolve lead into the oil. There’s lead in recycled oil.[1] Human body can hardly merabolize and degrade lead. To the human body, lead is a chronic and cumulative poison; it may easily lead to poisoning or even carcinogenic. Therefore, we decided to detect lead.
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The harm of lead
Lead can cause several unwanted effects, such as:
- Disruption of the biosynthesis of haemoglobin and anaemia
- A rise in blood pressure
- Kidney damage
- Miscarriages and subtle abortions
- Disruption of nervous systems
- Brain damage
- Declined fertility of men through sperm damage
- Diminished learning abilities of children
- Behavioural disruptions of children, such as aggression, impulsive behavior and hyperactivity
Lead can enter a foetus through the placenta of the mother. Because of this it can cause serious damage to the nervous system and the brains of unborn children.[2]
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Taiwan’s standards
The maximum allowance of lead in edible oil is 0.1 ppm.[3]