To reduce the determining error of micro amount of arsenic, a method testing micro amount of arsenic with coulomb titration method was introduced.
为了减小微量砷测定中的误差，介绍了用库仑滴定法测量微量砷的一种方法。
2
The invention relates to a charge-super sensitive Coulomb meter and its preparation method that belongs to microelectronic device and micro-processing method.