摘要:EA-IRMS测定植物、土壤、硝酸盐等含氮样品的氮同位素时,往往忽视样品化学性质对测试结果的影响。尽管大部分有机物的氮同位素分析没有问题,但是不同的文献显示定量的将硝酸盐转换为氮气仍然存在困难。
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