Particles/cm3轉化為MG/M3

Question

63000Particles/cm3轉化為MG/M3

如何換算

已更新項目:

請問直讀式量測值為6300 已知密度為0.8611 g/c.c.假設d=0.3μm

V= (π/6)d^3 = (π/6) x (0.3 x 10^(-6))^3 = 1.414 x 10^(-20) m^3

ρ= 0.8611 g/cm^3 = 861.1 kg/m^3

w = vρ = 1.414 x 10^(-20) x 861.1 =1.21735x 10^(-11)mg

1 praticle/cm^3 = 1.21735x 10^(-11) x 10^6 = 1.21735x 10^(-5) mg/m^3

2 個已更新項目:

第四種粉塵濃度=1.21735x 10^(-5) x6300=0.766930763 mg/m^3<10 mg/m^3(合格)

是這樣算嗎?

Answer 1

最佳解答

一般測空氣中大顆粒的數據會得到praticles/cm^3或pts/cm^3 如要化為mg/m^3, 須知顆粒的平均大小及密度 如球狀顆粒，0.3μm、密度2.0 g/c.c. V= (π/6)d^3 = (π/6) x (0.3 x 10^(-6))^3 = 1.414 x 10^(-20) m^3 ρ= 2 g/cm^3 = 2000 kg/m^3 w = vρ = 1.414 x 10^(-20) x 2000 =2.828 x 10^(-17) kg = 2.828 x 10^(-11) mg 1 praticle/cm^3 = 2.828 x 10^(-11) x 10^6 = 2.828 x 10^(-5) mg/m^3

Answer 2

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