The main methods are: glass - electrodes method, potassium dichromate method and statistical method.采用的主要方法有: 玻璃电极法, 重铬酸钾法,统计学方法等.Preferally, the anion portion of the salt is permanganate, iodate, dichromate or hyperchlo...
The proof is recoated with dichromate emulsion.将这张校样重新涂以重铬酸盐乳剂.Preferally, the anion portion of the salt is permanganate, iodate, dichromate or hyperchlorite.它的阴离子部分最好是高锰酸, 碘酸, 重铬酸或过氯酸根.The main methods are: glass - elec...