54
EN
• Cleaning liquid 2 removes cleaning liquid 1 (has to be a good solvent for
cleaning liquid 1) and evaporates easily in order to accelerate drying of
the cell. It must not attack the U-tube or leave any deposits, as drops of
cleaning liquid 2 will remain in the U-tube.
TIP:
To prevent limestone deposits, never use tap water as cleaning liquid 2,
but use purified (e.g. deionized water) instead.
Sample
Cleaning liquid 1
Cleaning liquid 2
Petroleum
products
Toluene, petroleum
naphtha, petroleum
ether, n-nonane,
cyclohexane, …
Ethanol
Battery acid
Tap water
Ultra-pure (bi-distilled or
deionized) water
Liquid soap &
detergent,
shampoo
Tap water
Ultra-pure (bi-distilled or
deionized) water
Salad dressing,
mayonnaise
Petroleum naphtha, dish
washing agent in water
Ethanol
Sun tan lotion
Petroleum naphtha
Ethanol
Soft Drinks
Tap water
Ultra-pure (bi-distilled or
deionized) water
Beer & Spirits
Tap water
Ultra-pure (bi-distilled or
deionized) water
Beer wort, grape
juice, syrup
Warm tap water
Ultra-pure (bi-distilled or
deionized) water
Milk
Tap water, enzymatic lab
cleaner
Ultra-pure (bi-distilled or
deionized) water
98 % H
2
SO
4
70 % H
2
SO
4
40 % H
2
SO
4
followed by
ultra-pure (bi-distilled or
deionized) water
