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Adjustment of the automatic sample vials storage vials cleaning solution formulation:
1. Pour out the sample;
2. Rinse with water or ethanol (depending on the nature of the sample);
3. Soak in alkaline water or washing solution (depending on the nature of the sample);
4. Rinse the water regularly for countless times;
5. Rinse the ultrapure water three times;
6. Drying.
Dichromic acid lotion: This lotion is prepared from concentrated sulfuric acid and potassium dichromate (usually 25g K2Cr2O7 is placed in a beaker, dissolved in 50cm3 of water, and then slowly added to 450cm3 concentrated sulfuric acid with constant stirring. ), it is dark brown, has strong acidity and strong oxidizing property, and has strong detergency for organic matter and oil stains. In the accurate quantitative experiment, the nozzle is small and the tube is fine. It is difficult to brush the instrument mechanically with a brush, and it can be washed by washing the night. When washing, put a small amount of washing liquid, and tilt the instrument to make the tube wall wet by the washing liquid. After turning for a while, pour it back into the original lotion vials, then wash the washing liquid remaining in the instrument with tap water, and then wash it three times with a small amount of distilled water. If you soak the instrument with lotion or heat the lotion, it will work better.
Recipe 1:
Potassium dichromate 150g
Distilled water 300ml
Concentrated sulfuric acid 3 000ml
This is a strong lotion.
Add potassium dichromate to distilled water to dissolve it naturally or dissolve in water bath. It can also be dissolved and dissolved in large sputum. Then slowly add concentrated sulphuric acid and stir while stirring. See the heat and stop it slightly. After cooling, continue. plus.
The container for the cleaning liquid should be strong, and the glass cover should be thickened. Wear a rubber apron, long rubber boots, glasses and thick rubber gloves to ensure safety.
Once the lotion turns green, it means that the chromic acid has been reduced and lost its oxidizing ability and should not be reused. If the washing liquid is heated, and an appropriate amount of potassium dichromate is added, it can be reused.
Recipe 2:
Concentrated sulfuric acid 50%
Distilled water 50%
Potassium dichromate 5%
This is a medium strength lotion storage vials.
Recipe 3:
Potassium dichromate 100g
Distilled water 1 000ml
Industrial sulfuric acid 100ml
This solution is a weak lotion and is brownish red.
When using this solution in an autosampler vials, the glassware must be washed with hot soapy water, storage vials rinsed with tap water, drained before it can be immersed, otherwise the lotion will quickly fail.
This is the end of the introduction of Automatic autosampler vials cleaning solution formulation adjustment. I hope it can help you.
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