用液上气相色谱法测定了不同温度及中和度下饱和磷铵料浆的平衡水蒸汽压 ,所得数据经回归处理 ,得到温度及中和度对水蒸气压影响的经验关系式。结果表明 ,当温度一定时 ,水蒸气分压随中和度增高而降低 ,温度越高水蒸气压的降低值越大 The equilibrium water vapor pressures of saturated ammonium phosphate slurries at different temperatures and degrees of neutralization were determined by headspace gas chromatography. The obtained data were regressed to obtain the empirical relationship between the effects of temperature and neutralization on water vapor pressure. The results show that when the temperature is constant, the partial pressure of water vapor decreases with the increase of neutralization degree. The higher the temperature, the lower the value of water vapor pressure