环境科学导刊
環境科學導刊
배경과학도간
ENVIRONMENTAL SCIENCE SURVEY
2012年
3期
80-82
,共3页
过硫酸钾%总氮%测定%方法%改进
過硫痠鉀%總氮%測定%方法%改進
과류산갑%총담%측정%방법%개진
potassium persulfate%total nitrogen%determination%method%improvement
对过硫酸钾氧化法测总氮应该注意的问题进行了实验研究,得出结论：为了控制精度最好使用无氨水和蒸馏水,过硫酸钾使用前应该进行2次重结晶,氢氧化钠溶液的浓度应该控制在12g/L左右,测定样品置于灭菌器中必须保证压力达到0.1～0.4MPa,消解温度控制在126℃～127℃为宜,消解时间应该≮50min。
對過硫痠鉀氧化法測總氮應該註意的問題進行瞭實驗研究,得齣結論：為瞭控製精度最好使用無氨水和蒸餾水,過硫痠鉀使用前應該進行2次重結晶,氫氧化鈉溶液的濃度應該控製在12g/L左右,測定樣品置于滅菌器中必鬚保證壓力達到0.1～0.4MPa,消解溫度控製在126℃～127℃為宜,消解時間應該≮50min。
대과류산갑양화법측총담응해주의적문제진행료실험연구,득출결론：위료공제정도최호사용무안수화증류수,과류산갑사용전응해진행2차중결정,경양화납용액적농도응해공제재12g/L좌우,측정양품치우멸균기중필수보증압력체도0.1～0.4MPa,소해온도공제재126℃～127℃위의,소해시간응해≮50min。
The experiment shows that during the determination of total nitrogen by potassium persulfate oxidation method,for accuracy control the water without ammonia and the distilled water would be better used,the recrystallization should be done twice before using potassium sulfate,the concentration of sodium hydroxide solution should be controlled at about 12 g/L,the pressure of the sample sterilizer be kept at 0.1-0.4 Mpa,the temperature of digestion be kept between 126℃-127℃,and the time of digestion should be not less than 50 minutes.
