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I can't comment from a chemists point of view and am not advocating its use (or disuse), but I can confirm that ever since I was a small kid (growing up in South Africa), we washed Iceburg lettuce with this on a very regular basis (daily to weekly), and no one ever suffered any ill effects attributable to Potassium Permanganate. I still do this for washing Iceburg lettuce 25 years later.
How I was taught to do it -
Get a large bowl - one you could half fill, and add an iceburg lettuce to. I have only ever used stainless steel or glass bowls to do this. This is probably important.
Disolve a tiny amount of PP in water - something in the region of 2 tiny crystals, crushed between 2 spoons so it is a finer powder and disolves in water quickly. The final colour should be a light magenta/purple. To confirm the amount used is tiny - a 5cm high, 1cm bottle is probably 10 lifetimes supply.
Be carefull not to drop the crystals, as they can die the skin, and most things they come into contact with.
Chop the lettuce, add to the mixture and stirr / wash for a few minutes. I suspect you should use a spoon, but I use my hands.
Drain the solution and wash the lettuce in plain water. I wash the lettuce 3 times in plain water, then put the lettuce in a sieve and run more water through.
Hope this helps.
DG.
What else can I help you with?
Why are darker vegetables more nutritious than lighter coloured vegetables?
Darker lettuce has more vitamins & minerals than lighter-colored lettuce. These "leafy green vegetables" have vitamins A, C, and K, folate, iron, and potassium.
What are some of the health benefits of eating romaine lettuce?
Romaine is a very healthy lettuce to eat. It not only contains fiber, but it is also a good source of vitamins like C and some B vitamins. Romaine lettuce also contains Potassium and is rich in minerals like Copper and Magnesium to name a few.
What part of the lettuce is eaten?
"As a rule of thumb, the outer leaves as well as lettuce varieties that are dark green and reddish in color are the most nutritious. But even popular, but pale, iceberg lettuce provides water, fiber, folate, and small amounts of other important vitamins and minerals like zinc and potassium." -http://www.bcm.edu/cnrc/consumer/archives/lettuce.htm
What substances would you find in dried lettuce?
Well, darling, in dried lettuce you'd find the same substances as in fresh lettuce, just in a more concentrated form - water, fiber, vitamins (like A and K), and minerals (like potassium and calcium). So, if you're looking for a crunchy way to get your nutrients, dried lettuce might just be your jam. Just don't expect it to taste as good as a fresh salad, honey.
What is the meaning of lettuce?
Because it's a vegetable.It also depends on what type of lettuce you are eating. Iceberg lettuce has little nutrition whereas spinach or romaine have much more nutritional value. The rule is the greener the lettuce the more healthy.
What nutrition do you find in lettuce?
Very few calories (15 per 100 gr) A good amount of vitamins A and C, potassium and fiber; and some calcium, iron and magnesium.
What is the possessive form of lettuce?
The possessive form for the singular noun lettuce is lettuce's.
How much Potassium does lettuce have?
Spinach contains approximately 2.86 grams of protein per 100 grams of raw spinach.
How is romaine lettuce different from regular lettuce?
romaine lettuce is different because it is much fresher than reg lettuce.
What is the plural of lettuce?
The noun lettuce has varied usage in the plural. Traditionally the usage is "three heads of lettuce", but the alternative "three lettuces" has become very common during the last century. The collective noun is always "I like lettuce" or "this farmer grows lettuce".
What part of speech is the word lettuce?
Lettuce is a noun.
Does lettuce have skin?
No, lettuce has leaves.
