[Study on blood lead of rats in long-term toxicity test with goupi gao].
OBJECTIVE
To observe dynamic changes of blood lead concentration in rats with long-term toxicity test with Goupi Gao by the flame atomic absorption spectrometry, in order to provide reference for safe administration of Goupi Gao.


METHODS
The rats were administered with Goupi Gao by high-dose (7 g x kg(-1)), medium-dose (3.5 g x kg(-1)), low-dose (1.75 g x kg(-1)) by external use for consecutively 90 days. Then, the blood samples were collected from the rats before the administration and at 10, 30, 45, 52, 60, 90 d after the administration respectively, as well as 16 d and 28 d after the drug withdrawal. The samples were dispelled with microwave digestion system and then were determined by graphite furnace atomic absorption spectrometry for blood lead levels.


RESULTS
According to methodological study, the standard curve regression equation in this experiment was A = 0.004 9X + 0. 017, r = 0.999 5, with the detection limit up to 0. 380 microg x L(-1). The RSD was 1.4% by precision checks. Blood lead level of mixed blood samples was 175.77 microg x L(-1), whose RSD was 6. 0%. Blood lead concentration gradually increased after low-dose and medium-dose administration to rats and became stable at the 10th day and the 30th day by high-dose. Dose is directly related to blood lead concentration. Meanwhile, the blood lead concentration decreases after the drug withdrawal.


CONCLUSIONS
The method of determination in this experiment is so accurate and reliable that it can be used for the determination of blood lead. Long-term and high-dose external use of Goupi Gao can increase blood lead.
College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China. lff19871223@163.com
Fanfan
F
Li
Xianli
X
Meng
Guiqing
G
Zhao
Yong
Y
Zeng
Ping
P
Wang
Hong
H
Li
Yihang
Y
Qiu
D000818:Animals; D004305:Dose-Response Relationship, Drug; D004365:Drugs, Chinese Herbal / Q000008:administration & dosage / Q000633:toxicity*; D005260:Female; D007854:Lead / Q000097:blood*; D008297:Male; D011897:Random Allocation; D051381:Rats; D017207:Rats, Sprague-Dawley; D013054:Spectrophotometry, Atomic / Q000379:methods*; D013997:Time Factors; D018675:Toxicity Tests
D004365:Drugs, Chinese Herbal; D007854:Lead