JP4822278B2 - 粒子質量分析方法 - Google Patents
粒子質量分析方法 Download PDFInfo
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- JP4822278B2 JP4822278B2 JP2007059076A JP2007059076A JP4822278B2 JP 4822278 B2 JP4822278 B2 JP 4822278B2 JP 2007059076 A JP2007059076 A JP 2007059076A JP 2007059076 A JP2007059076 A JP 2007059076A JP 4822278 B2 JP4822278 B2 JP 4822278B2
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Description
mrcω2=neV/ln(r2/r1)・・・・(1)
式(1)中、rcは粒子の動径座標、ωは電極の回転角速度、nは粒子が帯びる電荷の数、eは電荷素量、Vは電極印加電圧、r1は内側電極の外側半径、r2は外側側電極の内側半径を示す。
前記両電極間に印加する電圧を所定の時間連続的に変化させ、および/または前記両電極の回転速度を所定の時間連続的に変化させ、前記両電極の電圧および/または回転速度と前記時間内の時刻tの関数V(t)を得るとともに、前記粒子の通過数を前記時刻tの関数N(t)として算出し、次いで関数N(t)と時刻tから一定時間遡った時刻t’での関数V(t’)との関係から関数N(V)を導出し、該関数N(V)から粒子質量分布を得ることを特徴とする粒子質量分析方法が提供される。
また、前記外側電極および前記内側電極は、略円筒状を成すことが好ましい。
また、測定対象が時間の経過とともに挙動が変動しやすいエアロゾル粒子などであっても、極めて短い時間で粒子質量の測定が可能になるため、高精度な粒子質量分布を得ることが可能になる。
mrcω2=neV/ln(r2/r1)・・・・(1)
Claims (2)
- 共通の対称軸まわりでそれぞれ回転する外側電極と内側電極との間に気体を連続的に吸引すると共に、両電極間に直流電圧を印加して静電場を形成し、気体中に含まれる粒子に働く静電気力と遠心力とのつりあいを利用して、特定の範囲の比質量をもつ粒子のみが浮遊する気体を連続的に外部に取り出す粒子質量分析方法であって、
前記両電極間に印加する電圧を所定の時間連続的に変化させ、および/または前記両電極の回転速度を所定の時間連続的に変化させ、前記両電極の電圧および/または回転速度と前記時間内の時刻tの関数V(t)を得るとともに、前記粒子の通過数を前記時刻tの関数N(t)として算出し、次いで関数N(t)と時刻tから一定時間遡った時刻t’での関数V(t’)との関係から関数N(V)を導出し、該関数N(V)から粒子質量分布を得ることを特徴とする粒子質量分析方法。 - 前記外側電極および前記内側電極は、略円筒状を成すことを特徴とする請求項1記載の粒子質量分析方法。
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JP2007059076A JP4822278B2 (ja) | 2007-03-08 | 2007-03-08 | 粒子質量分析方法 |
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JP2008224246A JP2008224246A (ja) | 2008-09-25 |
JP4822278B2 true JP4822278B2 (ja) | 2011-11-24 |
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JP2007059076A Expired - Fee Related JP4822278B2 (ja) | 2007-03-08 | 2007-03-08 | 粒子質量分析方法 |
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Families Citing this family (1)
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WO2010143426A1 (ja) | 2009-06-10 | 2010-12-16 | Msi.Tokyo株式会社 | サイクロンセパレータ式質量分析システム |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2517872B2 (ja) * | 1993-08-16 | 1996-07-24 | 工業技術院長 | エアロゾル粒子質量分析方法 |
JPH08261911A (ja) * | 1995-03-27 | 1996-10-11 | Nippon Kagaku Kogyo Kk | 粒径分布測定装置 |
JP3435015B2 (ja) * | 1997-04-15 | 2003-08-11 | 理化学研究所 | 微粒子分析装置およびその方法 |
JP3086873B2 (ja) * | 1998-08-04 | 2000-09-11 | 工業技術院長 | 粒径分布測定方法及び装置 |
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