DETERMINATION OF SUB-MICROQUANTITIES OF AMMONIUM AND NITRATES IN SOILS WITH PHENOL, SODIUM NITROPRUSSIDE AND HYPOCHLORITE
DETERMINATION OF SUB-MICROQUANTITIES OF AMMONIUM AND NITRATES IN SOILS WITH PHENOL, SODIUM NITROPRUSSIDE AND HYPOCHLORITE
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DOI：
10.1016/0016-7061(74)90068-8
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发表时间：
1974-01-01
期刊：
影响因子：
6.1
通讯作者：
KEMPERS, AJ
中科院分区：
文献类型：
--
作者：
KEMPERS, AJ
本文研究了用凯氏蒸馏后的贝特洛反应测定土壤中亚微量铵态氮和硝酸盐的可能性。在硝普钠（五氰基亚硝基高铁酸二钠）和次氯酸盐存在下，氨-酚复合物形成的蓝色足够稳定、特异和强烈，可检测土壤提取物或消化物中低至0.005 ppm的铵浓度。硝酸盐经还原和蒸馏后可测定为铵。颜色强度比纳氏试剂产生的颜色强度大约9倍。
The possibilities of determining sub-microquantities of ammonium and nitrate in soils were investigated, using Berthelot's reaction after Kjeldahl distillation. The blue color formed by the ammonia-phenol complex in the presence of sodiumnitroprusside (disodiumpentacyanonitrosylferrate) and hypochlorite is sufficiently stable, specific and intense to detect ammonium concentrations as low as 0.005 p.p.m. in the soil extract or digest. Nitrates can be determined as ammonium after reduction and distillation. The color intensity is about nine times greater than that produced by Nessler's reagent.