CANDY
发表于 2025-3-28 16:22:32
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我还要背着他
发表于 2025-3-28 20:08:49
Silicate Analysis as Viewed by Geological Surveysost difficult and exacting forms of analysis, often requiring many hours for one determination. As analysts in such laboratories are confronted with a bewildering variety of samples, they must be familiar with many chemical and physical methods of analysis. A particular philosophy and special types
osteocytes
发表于 2025-3-28 23:44:48
Silicate Analysis—a Glance Backward and a Look Forwardoldschmidt’s geochemical investigations in the 1930’s established the utility of spectrography for quantitatively determining trace elements in rocks. This technique remains the best instrumental method for yielding the maximum qualitative and quantitative information with the minimum effort. This s
Overthrow
发表于 2025-3-29 06:41:45
Developments in Applied Spectroscopyhttp://image.papertrans.cn/d/image/270155.jpg
大火
发表于 2025-3-29 09:46:01
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nautical
发表于 2025-3-29 14:49:54
Glass Reference Standards for Trace Element Analysis of Geologic Materialsn 46 added elements at uniform concentration levels aimed at 500, 50, 5, and 0.5 ppm, respectively. The blank represents the matrix composition approximating an average igneous rock. Preliminary evaluation spectrochemically of the trace element content and homogeneity of these glasses has demonstrated their usefulness as reference standards.
尾巴
发表于 2025-3-29 17:29:18
Alternate Methods for the Determination of Boron in Silicateso statistical evaluation; the methods were shown to be identical, within experimental error, in precision and accuracy, and the results obtained by one method are interchangeable with results obtained by the other.
thyroid-hormone
发表于 2025-3-29 22:46:43
Droplet Deformation and Breakupest. A totally comprehensive review is no longer feasible and is of questionable desirability. These restrictions necessarily limit the scope of this review to fundamental studies and applications which are new, unique, or extensive.
Generic-Drug
发表于 2025-3-30 01:54:41
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小样他闲聊
发表于 2025-3-30 06:14:35
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