在40mLCO、CH<sub>4</sub>、N<sub>2</...
Friday, September 16, 2022
Friday, September 16, 2022
欲配制pH=10的缓冲溶液选用的物质组成是()。A、NH3-NH4ClB、HAc-NaAcC、NH3-NaAcD、HAc-NH3...
Sunday, May 28, 2023
若以冰醋酸作溶剂,四种酸: (1)HClO<sub>4</su...
Saturday, September 10, 2022
启动气相色谱仪时,若使用热导池检测器,有如下操作步骤: 1、开...
Tuesday, September 13, 2022
利用Q检验法对可疑数据进行分析处理不是中级分析工供应掌握的知识。...
Friday, September 16, 2022
使用阿贝折光仪测定样品的折光率,下列选项()的操作可以使测定结果...
Tuesday, September 13, 2022
Tuesday, September 13, 2022
Friday, September 16, 2022
Sunday, September 11, 2022
0.01mol/LNaOH溶液中[H+]对0.001mol/LN...
Friday, September 16, 2022
Saturday, September 10, 2022
缓慢灰化法测灰分时,为了使有机硫和硫化铁硫充分氧化需要在500℃...
Tuesday, September 13, 2022
Saturday, September 10, 2022
测定氨氮时应先加入纳氏试剂,然后再加入酒石酸钾钠,次序不得相反。...
Friday, September 16, 2022
以下()条不符合化验室安全条例。A、禁止无关人员进入化验室B、化验室内禁止吸烟C、不使用无标签容器中的试剂,试样D、凡进行危险性实验时,实验人员应该在实验期间尽量缩短在实验现场的逗留时间...
Friday, September 16, 2022
某难挥发的非电解质稀溶液的沸点为100.40℃,则其凝固点为()...
Tuesday, September 13, 2022
Friday, September 16, 2022
测定废水化学需氧量,取水样100mL空白滴定和返滴定时耗用的硫酸...
Friday, September 16, 2022
Friday, September 16, 2022