我们还对传统的甲醛—硫酸法进行了改良，并将新的甲醛—硫酸法运用于硝酸尿素金属络合物中的酰氨态氮和总氮含量的测定中。
We also improved the conventional formol-H2SO4 titrimetric method, and applied it into the determinations of the contents of amide nitrogen and total nitrogen in urea nitrate metal complexes.
他和同事们研究了肥料中的一系列化学物质，包括硝酸盐，铵和尿素，观察他们对海藻的影响。
So he and his colleagues tested a range of chemicals found in fertilizers, including nitrate, ammonium and urea, to determine their effects on the algae.
建立了对二甲氨基苯甲醛法和亚硝酸盐——格里斯试剂法两种对牛奶中掺入的尿素的快速检测方法。
In this paper, two rapid detection methods for carbamide in milk, namely p-dimethylaminobezaldehyde method and Nitrite-Griess method, were developed.
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