Colorimetric determination of nitrate involves the use of cadmium to reduce nitrate to nitrite. Nitrite is then reacted with another reagent to form a reddish dye. The intensity of the color produced is proportional to the nitrate concentration in the sample. YSI offers a few different instruments...
Standard Test Methods for Nitrite-Nitrate in WaterMaAstm
The effects on human health of raised nitrate and nitrite levels in drinking water are currently unclear. Objectives We conducted a systematic review of peer-reviewed literature on the association of nitrate and nitrite in drinking water with human health with a specific focus on cancer. Methods ...
Nitrate is far less toxic thannitriteand much less toxic thanAmmonia. The level of Nitrate in water that may damages aquatic animals varies considerably in each species and at their stage of growth. With mortality of eggs and very young fry being sensitive to low levels (~20 mg/l) of nit...
We need to cutnitratelevels in water. 我们需要降低水中的硝酸盐含量。 牛津词典 High levels ofnitrateoccur in eastern England because of the heavy use of fertilizers. 英格兰东部因大量使用化肥导致土壤硝酸盐浓度过高。 柯林斯高阶英语词典 Objective To introduce a new method to prepare miconazolenitratecre...
Reuse water produced from municipal wastewater by a membrane bioreac... AM Comerton,RC Andrews,DM Bagley - 《Journal of Environmental Engineering & Science》 被引量: 7发表: 2006年 A Comparison of the Levels of Nitrate, Nitrite and Phosphate in Homemade brews, Spirits, in Water and Raw ...
Normalplasma levelsof nitrate in humans are in the 20–40μM range while nitrite levels (50–300nM) are substantially lower (Kelm et al., 1999;Gladwin et al., 2000;Lundberg and Govoni, 2004;Rassaf et al., 2004). Regular exercise increases eNOS expression and activity (Green et al., 20...
Block Copolymer Surfactant Mixtures in Aqueous Solution: Can we Achieve Size and Shape Control by Co-Micellization?, by Thomas Hellweg; Non-ionic Thermoresponsive Polymers in Water, by Vladimir Aseyev, Heikki Tenhu and Fran莽oise Winnik;... MÜller - Springer Berlin Heidelberg 被引量: 76发表...
Nitrate and Nitrite in Drinking Water 作者:Subcommittee on Nitrate and Nitrite in D; Committee on Toxicology; National Research Council 出版年:1995-1 页数:78 定价:$ 34.75 ISBN:9780309083706 豆瓣评分 目前无人评价
analysis showed a negative correlation between Nitrite concentrations anddepth of the aquifer (P-value = 0.034, R = 0.44), ie, with increasing depth there werelower nitrate levels.There was no relationship between nitrate concentrations and the distance of water wellsfrom the sites of wastewater ...