The peak suppression effect, which suppresses the argon isotope signal due to the incomplete cleaning of gas from geological samples during measurement, is found in volatile-rich samples using the ARGUS VI noble gas mass spectrometer and its sample preparation system. Such effect hampers getting the precise isotope ratio essential for the 40Ar/39Ar age calculation. The addition of one hot-getter and three room-temperature getters to the sample preparation system can effectively eliminate the peak suppression effect for several milligrams of sample during argon measurement to yield highly plausible 40Ar/39Ar ages of Quaternary volcanic rocks. The modified preparation system makes it possible to get highly precise zero-time isotope signals, and thereby a geologically plausible 40Ar/39Ar age, especially for a small amount of volatile-rich samples.

中文翻译：

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通过消除峰值抑制效应改进第四纪玄武岩 40Ar/39Ar 年龄测定

使用 ARGUS VI 惰性气体质谱仪及其样品制备系统在富含挥发物的样品中发现了峰值抑制效应，该效应抑制了测量过程中由于地质样品中的气体未完全净化而导致的氩同位素信号。这种效应阻碍了获得 40Ar/39Ar 年龄计算所必需的精确同位素比。在样品制备系统中加入1个热吸气剂和3个常温吸气剂，可有效消除氩气测量过程中几毫克样品的峰抑制效应，从而得到高度可信的第四纪火山岩40Ar/39Ar年龄。改进后的制备系统可以获得高精度的零时同位素信号，从而获得地质上合理的 40Ar/39Ar 年龄，特别是对于少量富含挥发物的样品。