正交多项式回归设计是一个研究多因素效应的高效率的试验设计方法,本文用这种方法研究了用石墨炉原子吸收法测定铂的条件,得到的最佳测定条件是灰化温度800℃,原子化温度2500℃,原子化时间6秒。灰化时间在20和40秒内可以任选。建立了铂吸光度与灰化温度、原子化温度及原子化时间之间的相关关系。用上述最佳条件测定铂的检出限为2.2×10~(-10)克,相对标准偏差为2.2％(n=4)。 Orthogonal polynomial regression design is a high-efficiency experimental design method to study the multi-factor effect. In this paper, the conditions of the determination of platinum by graphite furnace atomic absorption spectrometry were studied in this paper. The best determination conditions were the ashing temperature of 800 ℃, Atomization temperature 2500 ℃, atomization time 6 seconds. Ashing time is optional for 20 and 40 seconds. The relationship between platinum absorbance and ashing temperature, atomization temperature and atomization time was established. The best detection limit of platinum was 2.2 × 10 ~ (-10) g and the relative standard deviation was 2.2% (n = 4).