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众所周知,在恒温条件下的原子化,吸收信号峰值Ap可用下式表示: (1) 如果原子化温度T_p较高,原子生成速率常数K_1大大地大于原子散失速率常数K_2,在这种情况下,A_p≈βN_o,即达到了所谓理想原子化。但是。绝大多数的电热原子化器是在升温条件下工作的。如果在原子化过程中,石墨管的温度和时间成线性关系,即T_p=T_o+at_p,并且采用温度控制,那末,A_p可用公式(2)表示: (2) 把t_p=t′+t′代入公式(2)得: 如果t→0,则t′→0,A_p可近似表达为(2) 这里A_I为恒温条件下(原子化温度为T_p)的原子化峰值。
It is well-known that at constant temperature, the peak Ap of the absorption signal can be expressed as follows: (1) If the atomization temperature T_p is high, the atomic production rate constant K_1 is much larger than the atomic loss rate constant K_2. In this case, A_p ≈ βN_o, that is, the so-called ideal atomization. but. The vast majority of electrothermal atomizers work at elevated temperatures. If during the atomization process, the temperature and time of the graphite tube are in a linear relationship, that is T_p = T_o + at_p, and the temperature control is used, then A_p can be expressed as formula (2): (2) t_p = t ’+ t’ Substituting equation (2), if t → 0 then t ’→ 0, A_p can be approximated by (2) where A_I is the peak of atomization at constant temperature (atomization temperature T_p).