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作者曾研制两种碳同位素的标准样品,为分别含1.095(1)和88.54(3)原子％~(13)C的碳酸钡试剂,这里括号内的数值表示末位数的准确度。今进一步研制一种~(13)C丰度更高的标准样品,为含98.11(3)原子％~(13)C的碳酸钡,并对一台质谱计在测定全量程~(13)C丰度时,观察了质量歧视效应的变化。
The authors have developed two standard samples of carbon isotopes that are barium carbonate reagents containing 1.095 (1) and 88.54 (3) atomic% ~ (13) C, respectively, where the numbers in parentheses indicate the accuracy of the last digit. This further developed a ~ (13) C abundance of more standard samples containing 98.11 (3) atomic% ~ (13) C of barium carbonate, and a mass spectrometer in the determination of the full scale ~ (13) C At abundance, changes in the quality discrimination effect were observed.