The method is improved for measuring formaldehyde in air by the method of pararosaniline hydrochloride using toxic mercury reagent.
2
试验过程试剂用量小,减少了银盐、汞盐、铬盐带来的二次污染问题;消解过程短,能有效降低能耗。
The first method use less reagents and avoid the secondary pollution from silver salt and mercuric salt and chromium salt with short digestion time which reduce the energy.