【摘要】 熏蒸空间ＰＨ３的测定用无动力采样和动力采样进行。两者间测定结果不存在显著差异。在实际工作中一些场合可用无动力采样代替动力采样。运用钼蓝比色法测定空气中ＰＨ３含量时，以７２０ｎｍ为测定波长较为适宜。对待测样品液稳定性分析的结果表明，未经显色处理及显色后盖上塞子的待测液较为稳定。２４ｈ内进行测定对最终结果不会产生影响。更多还原

【Abstract】 The studies on the methods to determine the amount of PH 3 in the fumigated space showed that there is no significant difference in final results between two methods of no power sampling and power sampling.The no power sampling can be used in practice instead of the power sampling.When determining the amount of PH 3 with the molybdenum blue spectrophotometry,it is proper to make 720 nm as wavelength for the determination.The analysis results on the steadiness of sample liquid showed that the untreated or unchanged blue sample liquid is steadier.There is no influence on the final results if determining within 24 hours.更多还原