作业帮1ppm甲醛等于多少mg /L?
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1ppm甲醛等于多少mg /L?
1ppm甲醛等于多少mg /L?
1ppm甲醛等于多少mg /L?
ppm是质量百万分之一比浓度（1*10^-6),要换算成mg /L,就要乘以物体的质量再除以物体的体积
Environmental quality of products, such as Europe and the United States must meet the requirements of national standards. Containing cadmium, lead sum of <50 ppm; DBT, TBT, MBT, and other organic comp...
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Environmental quality of products, such as Europe and the United States must meet the requirements of national standards. Containing cadmium, lead sum of <50 ppm; DBT, TBT, MBT, and other organic compounds sum of <2.5 ppm; non-azo dyes; 16 multi-ring aromatic <10 ppm; benzopyrene <1 ppm; Phthaloyl Salts <1000 ppm (specifically referring DEHP, DBP, BBP sum <1000 ppm; DINP, DIDP, DNOP sum <1000 ppm); formaldehyde <120 ppm; nonylphenol <100 ppmg; Nonyl polyoxyethylene <100 ppm carcinogenic dye <5 mg / L; pulsed dye <5 mg / L; organic chlorine carrier <1 ppm; benzene <100 ppm; mercury <5 ppm; arsenic <5 ~ 10 ppm; navy blue <5 ppm; PCBs <5 ppm and non-PVC (test method : Flame law or infrared); color fastness request to the U.S. standard light 80 hours over four (specific color fastness requirements of the detailed purchase orders-on-demand).
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应该1ppm甲醛=1/10^6
提示一下：1ppm=1/10^6
ppm浓度是指用溶质质量占全部溶液质量的百万分比来表示的浓度,也称百万分比浓度。 1ppm甲醛=1mg /L
1ppm甲醛=1000000
ppm是指百万分之一的比率 1ppm=1mg/l