Van Broekhoven L W, Davies J A
IARC Sci Publ. 1982(41):319-26.
During the fermentation of silages from nitrate-rich grass, the conditions are suitable for the formation of N-nitrosamines. Earlier investigations had shown that only low concentrations of volatile N-nitrosamines were formed. The first ten days of ensilage were investigated. The formation of nitrite was accompanied by the formation of volatile N-nitrosamines. NDMA and NDEA were detected in concentrations of up to about 2 micrograms/kg. After stabilisation of the silage, these concentrations dropped to about 0.6 microgram/kg. Preliminary results are presented concerning the presence of non-volatile N-nitroso compounds. The method of Walters et al. (1980) indicates that non-volatile N-nitroso compounds were present in amounts equivalent to 85 mg NPIP/kg sample.
在富含硝酸盐的草料青贮发酵过程中，条件适宜于N-亚硝胺的形成。早期研究表明，仅形成低浓度的挥发性N-亚硝胺。对青贮的前十天进行了研究。亚硝酸盐的形成伴随着挥发性N-亚硝胺的形成。检测到的NDMA和NDEA浓度高达约2微克/千克。青贮稳定后，这些浓度降至约0.6微克/千克。给出了关于非挥发性N-亚硝基化合物存在情况的初步结果。Walters等人（1980年）的方法表明，非挥发性N-亚硝基化合物的含量相当于85毫克NPIP/千克样品。
