岛津HH-NH3 工业氨水的成分测定专用填充柱

氨水又称阿摩尼亚水，主要成分为NH3•H2O，是氨气的水溶液，无色透明且具有刺激性气味。氨气熔点-77℃，沸点36℃，密度0.91g/cm^3。氨气易溶于水、乙醇。易挥发，具有部分碱的通性，氨水由氨气通入水中制得。氨气有毒，对眼、鼻、皮肤有刺激性和腐蚀性，能使人窒息，空气中高容许浓度30mg/m^3，主要用作化肥。

工业氨水是含氨25%～28%的水溶液，氨水中一小部分氨分子与水反应形成铵离子和氢氧根离子，即一水合铵，是仅存在于氨水中的弱碱。氨水凝固点与氨水浓度有关，常用的(wt)20%浓度凝固点约为35℃。与酸中和反应产生热。有燃烧爆炸危险。比热容为4.3×10^3J/kg•℃﹙10%的氨水）。

工业氨水理化性质

分子量：17.031

熔点(101.325kPa)：-77.7℃

沸点(101.325kPa)：-33.4℃

液体密度(-73.15℃，8.666kPa)：729kg/m3

气体密度(0℃，101.325kPa)：0.7708kg/m3

相对密度(气体，空气=1.25℃，101.325kPa)：0.597

比容(21.1℃，101.325kPa)：1.4109m3/kg

气液容积比：(15℃，100kPa)：947 L/L

临界温度：132.4℃

临界压力：11277kPa

临界密度：235kg/m3


由于氨水极性强，传统的色谱固定相测定氨水，柱效低，峰型拖尾，定量误差较大。浩瀚色谱（山东）应用技术开发有限公司，，研制出的氨水专用填充柱，此柱柱效高，分离好，氨和水基本不拖尾，定量准确，结果满意。

工业氨水的成分测定专用填充柱  测试谱图：



Special packed column for the determination of the composition of industrial ammonia
Special Packed Column for Composition Determination of Industrial Ammonia Details:

Name: Packed Column
Stationary Phase: Dedicated
Specifications: 2m*1/8
Model: HH-NH3
Application: Chromatographic determination of industrial ammonia and gaseous ammonia



Ammonia water, also known as Amonia water, is mainly composed of NH3•H2O. It is an aqueous solution of ammonia gas, which is colorless, transparent and has a pungent odor. The melting point of ammonia gas is -77°C, the boiling point is 36°C, and the density is 0.91g/cm^3. Ammonia is easily soluble in water and ethanol. It is volatile and has the property of partial alkali. Ammonia water is prepared by passing ammonia gas into water. Ammonia is toxic, irritating and corrosive to eyes, nose, and skin, and can suffocate people. The maximum allowable concentration in the air is 30mg/m^3. It is mainly used as fertilizer.

Industrial ammonia is an aqueous solution containing 25% to 28% of ammonia. only a small part of ammonia molecules react with water to form ammonium ions and hydroxide ions, namely ammonium monohydrate, which is a weak base that only exists in ammonia water. The freezing point of ammonia water is related to the concentration of ammonia water, and the commonly used (wt) 20% concentration freezing point is about 35 °C. The neutralization reaction with acid generates heat. There is a fire and explosion hazard. The specific heat capacity is 4.3×10^3J/kg•℃﹙10% ammonia water).

Physical and chemical properties of industrial ammonia

Molecular weight: 17.031

Melting point (101.325kPa): -77.7℃

Boiling point (101.325kPa): -33.4℃

Liquid density (-73.15℃, 8.666kPa): 729kg/m3

Gas density (0℃, 101.325kPa): 0.7708kg/m3

Relative density (gas, air=1.25℃, 101.325kPa): 0.597

Specific volume (21.1℃, 101.325kPa): 1.4109m3/kg

Gas-liquid volume ratio: (15℃, 100kPa): 947 L/L

Critical temperature: 132.4℃

Critical pressure: 11277kPa

Critical density: 235kg/m3


Due to the strong polarity of ammonia water, the traditional chromatographic stationary phase for the determination of ammonia water has low column efficiency, tailing peak shape, and large quantitative error. Haohan Chromatography (Shandong) Application Technology Development Co., Ltd. keeps pace with the times and has developed a unique packed column for ammonia water. This column has high column efficiency, good separation, basically no tailing of ammonia and water, accurate quantification, and satisfactory results.

Special packed column for the determination of the composition of industrial ammonia. Test spectrum: