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  • 质谱及核磁配套用通用型仪器、耗材和试剂的居间服务商，亦包括咨询及培训服务。     Intermediate service provider of general  instruments, consumables and reagents for mass spectrometry and nuclear magnetic resonance,incl consulting and training.
  • 质谱及核磁配套用通用型仪器、耗材和试剂的居间服务商，亦包括咨询及培训服务。     Intermediate service provider of general  instruments, consumables and reagents for mass spectrometry and nuclear magnetic resonance,incl consulting and training.
  • 质谱及核磁配套用通用型仪器、耗材和试剂的居间服务商，亦包括咨询及培训服务。     Intermediate service provider of general  instruments, consumables and reagents for mass spectrometry and nuclear magnetic resonance,incl consulting and training.
  • 质谱及核磁配套用通用型仪器、耗材和试剂的居间服务商，亦包括咨询及培训服务。     Intermediate service provider of general  instruments, consumables and reagents for mass spectrometry and nuclear magnetic resonance,incl consulting and training.
索引与类别
 
网站首页 ∷ 索引与类别 ∷ 稳定同位素金属 ∷ Selenium（硒）
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Selenium（硒）

Selenium（硒）

Nominal
  Mass

Accurate
  Mass

% Natural
  Abundance

Chemical
  Form

Enrichment
  Available %


74 Se

73.9224746 (16)

0.89 (4)

metal

31 – 98+


76 Se

75.9192120 (16)

9.37 (29)

metal

74 - 98+


77 Se

76.9199125 (16)

7.63 (16)

metal

68 - 99+


78 Se

77.9173076 (16)

23.77 (28)

metal

89 - 97+


80 Se

79.9165196 (19)

49.61 (41)

metal

96 - 99+


82 Se

81.9166978 (23)

8.73 (22)

metal

73 – 92+


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Nominal
  Mass

Accurate
  Mass

% Natural
  Abundance

Chemical
  Form

Enrichment
  Available %


74 Se

73.9224746 (16)

0.89 (4)

metal

31 – 98+


76 Se

75.9192120 (16)

9.37 (29)

metal

74 - 98+


77 Se

76.9199125 (16)

7.63 (16)

metal

68 - 99+


78 Se

77.9173076 (16)

23.77 (28)

metal

89 - 97+


80 Se

79.9165196 (19)

49.61 (41)

metal

96 - 99+


82 Se

81.9166978 (23)

8.73 (22)

metal

73 – 92+


硒同位素主要用于生产医疗和工业放射性同位素。Se-77和Se-78用于生产治疗用放射性同位素Br-77。Se-80用于生产医用放射性同位素Br-80m。Se-74用于生产Se-75，Se-75用作伽马射线照相的光源。Se-76可用于生产医用同位素Br-75和Br-76。Se-82已用于研究双β衰变。大多数硒同位素已用于研究硒作为必需营养素的作用。