肥料、土壤中氮磷钾等营养元素检测方案(毛细管电泳仪)

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Analytical Equipment四一、www.lumexinstruments.ccm DETERMINATION OF MACRONUTRIENTS IN FERTILIZERS INTRODUCTION The method is used for the determination of the mass fraction of all primary and secondary nutrients(macronutrients) in fertilizers by capillary electrophoresis. The method allows the determination of suchmacronutrients as ammonium nitrogen (ammoniacal nitrogen， NH4-N)， nitrate nitrogen (NO3-N)， phosphorus(P or P2O5)， potassium (K or K2O) as well as sodium， magnesium， calcium， sulfur， chlorine (chloride)， fluorine(fluoride). MEASUREMENT METHOD The measurement method is based on extraction of the components from a sample by water anddetermination of cations (ammonium， potassium， sodium， magnesium， calcium) and anions (chloride， sulfate，nitrate， fluoride， phosphate) by capillary electrophoresis with indirect UV detection at the wavelength of 254or 267 nm. EQUIPMENT AND REAGENTS The CAPEL capillary electrophoresis system is used in measurements. Data acquisition， collection，processing and output are performed using a personal computer running under WINDOWS@ XP/7/8/10operating systINem with installed dedicated software package ELFORUN. EXAMPLES OF REAL ANALYSES Sample： compound fertilizer Measurement results： 1-ammonium (5.7% as ammonium nitrogen) 2- potassium (27.8% as K2O) 3 -sodium (0.4%) 4-magnesium (0.1%) 5 - calcium (0.05%) Sample： compound fertilizer Measurement results： 1 - nitrate (13.4% as nitratenitrogen)2-phosphate (5.4% as P20s) 2 3 4 4.5 mAU The contents on this paper are subject to change without notice.To get more specific information， please contact the representative by sales@lumexinstruments.com     该方法用于毛细管电泳法测定肥料中所有初级和刺激营养物质的质量分数。该方法允许测定诸如铵态氮（氨态氮、NH4-N）、硝酸盐氮（NO3-N）、磷（P或P2O5）、钾（K或K2O）以及钠、镁、钙、硫、氯（氯离子）、氟（氟离子）等营养元素。