Device and method for measuring nitrite ions in milk powder
The invention discloses a device and a method for measuring nitrite ions in milk powder. The device comprises a sample injector, a quantitative loop, an infusion pump A, a guard column, a separation column, an infusion pump B, a derivative reaction tube, an ultraviolet and visible spectrophotometer,...
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| creator | ZHU YAN CHEN NING YE MINGLI ZHONG NAIFEI |
| description | The invention discloses a device and a method for measuring nitrite ions in milk powder. The device comprises a sample injector, a quantitative loop, an infusion pump A, a guard column, a separation column, an infusion pump B, a derivative reaction tube, an ultraviolet and visible spectrophotometer, a waste liquor bottle and a six-way valve, wherein the sample injector is connected with the six-way valve; the six-way valve is connected with the infusion pump and the guard column; the separation column is connected with a tee joint and then is connected with the infusion pump B; the tee joint is sequentially connected with the derivative reaction tube, the ultraviolet and visible spectrophotometer and the waste liquor bottle. A conventional anion exchange analytical column is used for realizing separation of the nitrite ions; compared with reported separation methods, ion exchange chromatography has relatively high separation capability, is generally applied to separating ions with similar properties, thus can |
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The device comprises a sample injector, a quantitative loop, an infusion pump A, a guard column, a separation column, an infusion pump B, a derivative reaction tube, an ultraviolet and visible spectrophotometer, a waste liquor bottle and a six-way valve, wherein the sample injector is connected with the six-way valve; the six-way valve is connected with the infusion pump and the guard column; the separation column is connected with a tee joint and then is connected with the infusion pump B; the tee joint is sequentially connected with the derivative reaction tube, the ultraviolet and visible spectrophotometer and the waste liquor bottle. 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| subjects | INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING PHYSICS TESTING |
| title | Device and method for measuring nitrite ions in milk powder |
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