发明名称 |
Testing tube construction for measuring sodium hydroxide and/or calcium oxide |
摘要 |
A testing tube for measuring sodium hydroxide and/or calcium oxide aerosols, comprises, a glass tube having breakoff points at each end to open at each end and containing a front layer of a substrate material impregnated with ammonium chloride and a following indicating layer of a substrate material impregnated with an acid and bromphenol blue.
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申请公布号 |
US4259287(A) |
申请公布日期 |
1981.03.31 |
申请号 |
US19790088125 |
申请日期 |
1979.10.25 |
申请人 |
DRAEGERWERK AKTIENGESELLSCHAFT |
发明人 |
LEICHNITZ, KURT |
分类号 |
G01N31/22;(IPC1-7):G01N31/22 |
主分类号 |
G01N31/22 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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