Highly flavored type liquor base cyanide analysis pre-treatment method
An analytical method, a cyanide technology, applied in material analysis by observing the effect on chemical indicators, analysis by chemical reaction of materials, color/spectral property measurement, etc., can solve the problem of high cost, troublesome operation, influence Analysis results and other problems, to achieve the effect of simple method, easy operation and accurate detection results
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[0010] The present embodiment analyzes the cyanide in Luzhou-flavor original wine according to the following steps:
[0011] Take 1mL of the Luzhou-flavor original wine sample to be tested in a 10mL colorimetric tube, add sodium hydroxide solution (2g / L) to 5mL, and let it stand for 10min to convert the cyanide into sodium cyanide; then heat the sample on a boiling water bath 5min to remove aldehydes in the sample; then add 2 drops of phenolphthalein indicator, adjust to red with acetic acid solution (1+6), then adjust to near red with sodium hydroxide solution (2g / L), add 2mL of phosphate Buffer solution, mix well, stand for 10min, add 0.2mL chloramine T solution (10g / L), shake well and let stand for 3min, then add isonicotinic acid-pyrazolone 2mL, add water to the mark, mix well, stand for 30min, Such as figure 2 As shown, the obtained solution is clear and transparent, and can be directly used for color comparison on a spectrophotometer to obtain a result.
[0012] By co...
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