为了观察尿中卟啉排出后的变化情况,我們选擇卟啉阳性的铅中毒患者102例,采集12小时的尿进行卟啉的連續測定。尿保存在棕色玻璃瓶內,室內气温大多为30～40℃,只有个別时間为23——28℃。卟啉的测定系采用螢光法,开始测定的时間距最后一次小便最多不超过3小时,以后每12小时复查一次,直至变为阴性为止。 在尿卟啉弱阳性的47例中,12小时內变为阴性者占42.6％,24小时內变为阴性者共83％,而在48小时 In order to observe the changes of urinary porphyrin after discharge, we selected porphyrin-positive 102 cases of lead poisoning patients, collected 12 hours of urine for continuous determination of porphyrin. Urine stored in brown glass bottles, the indoor temperature mostly 30 ~ 40 ℃, only a few individual time is 23-28 ℃. Porphyrin determination using fluorescent method, the beginning of the determination of the time from the last urine up to no more than 3 hours, after every 12 hours until the test again until negative. Of the 47 cases with weakly positive urinary porphyrin, 42.6% became negative in 12 hours and 83% became negative in 24 hours, whereas in 48 hours