茅台地区酱香白酒硼同位素组成的初步研究

A Preliminary Study for Isotopic Composition of Boron in Flavor Liquor from Maotai Region

汪强等在题为"茅台地区酱香白酒硼同位素比较研究"一文中采用ICP-MS检测茅台地区不同厂家生产的酱香型白酒中11B/10B比率,得到的11B/10B比值为0.8713～1.0610,此值之低,值得怀疑。采用离子交换的方法提取硼后,采用VG354热电离质谱计和基于加石墨检测Cs2BO2+离子测定硼同位素的方法,初步测定了茅台地区浓香型与酱香型白酒的11B/10B比值分别为4.0184和4.0437(δ11B=-7.9‰和-1.6‰),落在地球物质硼同位素组成正常变化范围内,基本是可靠的,与汪强所报道的异常低的结果存在极大差别。对汪文中造成测定的11B/10B比值异常的可能原因进行的分析表明,汪强的测定结果是不可信的。

ICP-MS was adopted to detect the 11B/10B ratio of Maotai-flavor liquor by Wang in the paper intided ＂Comparative research on boron isotope ratio of Maotai-flavor liquor in Maotai region＂. The meas- ured 11B/10B ratios were 0. 871 3 - 1. 061 0. Such abnormally low values are suspicious. In this paper, the method of ion exchange to extract boron and the isotopic measurement of boron based on Cs2BO2＋ with graphite load by VG354 thermal ionization mass spectrometer was adopted. The measured 11B/10B ratios of aromatic-type liquor and favor-type liquor in Maotai region are 4. 018 4 and 4. 043 7 （811B = -7.9%0 and - 1.6%o）, respectively, which lie in the variation range of isotopie composition of boron in terrestrial substance and are credible, but very different from the abnormally low values reported by Wang. The ana- lyses for the possible reasons causing the abnormal boron isotope ratio reported by Wang, show that the resuits reported by Wang are suspect.