Qiu H, Liu J
Kunming Instiute of Precious Metals, 650221 Kunming.
Guang Pu Xue Yu Guang Pu Fen Xi. 2001 Aug;21(4):555-7.
A graphite furnace atomic absorption spectrometric method has been established to determine trace lead and arsenic in copper aspirinate, a new anti-inflammatory and anti-thrombotic agent. The sample is pretreated by ashing at 530 degrees C in the presence of Ni (NO3)2, followed by dissolution with HNO3. The method is simple and has a low detection limit. The relative standard deviation is 11%-15%, the recovery is 92%-112% for lead and 86%-119% for arsenic.