Schütt I
Nahrung. 1977;21(1):61-7.
During the years 1972--1975, the author performed nitrate determinations, using the xylenol method according to E. Bohm, to verify if the standard or maximum permissible values established by the Ministry for Health of the GDR in 1972-1973 for spinach and spinach preserves for babies had been respected. The relative standard deviation of the method is +/- 5%. The values found in spinach samples of the same harvest and from the same area varied considerably (up to +/- 40% of the mean). Taken altogether, the nitrate content, especially in autumn spinach, exceeded by far the maximum permissible values for baby food as well as for general consumption in spite of contractual agreement with the farmers on the use of nitrogenous fertilizers. It is recommended to study systematically all the factors of nitrate accumulation in order to secure safe spinach products.
在1972年至1975年期间，作者采用根据E. 博姆的二甲苯酚法进行硝酸盐测定，以核实民主德国卫生部在1972 - 1973年为菠菜及婴儿菠菜罐头设定的标准值或最大允许值是否得到遵守。该方法的相对标准偏差为±5%。同一收获季且来自同一地区的菠菜样本中所测得的值差异很大（高达平均值的±40%）。总体而言，尽管与农民就氮肥使用达成了协议，但硝酸盐含量，尤其是秋菠菜中的硝酸盐含量，远远超过了婴儿食品以及一般消费的最大允许值。建议系统研究硝酸盐积累的所有因素，以确保菠菜产品的安全。
