二阶导数光谱法快速测定硝酸盐氮和亚硝酸盐氮
王静敏1, 张景超1,*, 张尊举1,2

Rapid Determination of Nitrate Nitrogen and Nitrite Nitrogen by Second Derivative Spectrophotometry
WANG Jing-min1, ZHANG Jing-chao1,*, ZHANG Zun-ju1,2
亚硝酸盐氮和硝酸盐氮混合样品的二阶导数光谱