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Western technical traditions of pottery making in Tang Dynasty China

This study is based on the SEM-EDS and LA-ICP-AES analyses of a sample of twenty-nine Tang sancai sherds unearthed from the Liquanfang site, Xi’an city. The results indicate that ceramics with yellowish bodies are calcareous and those with red bodies were made of ferruginous clays.

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Determination of Trace Elements in Copper by Radially Viewed ICP

Copper is considered to be the first metal used by man and has been mined for more than 10,000 years. Since copper is a soft, malleable metal, early civilizations learned to fashion tools, containers, ornaments and weapons from it. Once it was discovered that the addition of a small amount of tin to molten copper produced an alloy that was harder than copper, the Bronze Age had begun.

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Determination of the Halogen Elements in the Deep UV Region of the Spectrum by ICP

There are many applications where the ability to measure the halogen elements, at the same time as the metallic elements, is desirable. A few of these include the measurements of Cl and Br in refinery process fluids, the measurement of Cl and Br in waste oils and the determination of Cl-, Br- and I- in food supplements and drinking water.

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Determination of Alloying Elements in High Carbon Steel by Radially Viewed ICP

Carbon steels are by far the most frequently used steels. More than 85% of the steel produced in the US is carbon steel. These steels are classified by their carbon content. Table 1 shows the classification of carbon steels and some typical uses.

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Chemical and lead isotope analysis from the Warring States Period

In the context of the present study, we have conducted chemical and lead isotope analyses on twelve ancient glass samples unearthed from Chu tombs in Changde City, Hunan Province. The results of the chemical analysis of these samples show that all samples are PbOeBaOeSiO2 glasses, thus indicating that they are all traditional ancient Chinese glasses. The chemical results also suggest that all Bi wares may either share a common source or were produced according to similar recipes. In turn, the eye beads are different from the Bi wares for their distinct chemical composition.

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Chemical analysis of white porcelains from the Ding Kiln site, Hebei Province, China

The Ding kilns were some of the most famous early kilns of medieval China, producing huge quantities of white and cream-white porcelains of outstanding technical and aesthetic quality. Since 1949 they have been excavated three times, in 1965, in 1987, and in 2009 respectively. In this latest study 69 white porcelain sherds from assured contexts and from the 2009 excavations were analyzed using laser ablation techniques (ICP-AES).

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Analysis of Stainless Steel by Dual View Inductively Coupled Plasma Spectrometry

Stainless steels are a corrosion resistant family of iron alloys that have a minimum of 10.5% Chromium. Their corrosion resistance is largely due to the formation of a passive chromium (III) oxide (Cr2O3) layer, approximately 1 to 5 nanometers (nm) thick, on the surface of the steel. If this layer is damaged by cutting, scratching or abrasion, it will regenerate, provided sufficient oxygen is available. By contrast, Stainless steels have poor corrosion resistance in low oxygen environments since the oxide layer cannot be repaired quickly enough. In addition to chromium, Nickel, molybdenum and niobium are also alloyed to improve corrosion characteristics.

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Analysis of Lead-Based Paint using the Teledyne Leeman Labs Prodigy High Dispersion ICP

Lead-based paints have been used extensively for painting the interior and exterior surfaces of homes. These paints were applied to almost any surface; however, they were most commonly found on interior and exterior woodwork including: doors, window frames and windowsills, cupboards and interior moldings. Almost all of the homes constructed before 1970 contain some lead-based paint. Until 1950, some of these paints contained up to 50% lead (500,000 ppm) and by the late 1960s, paints containing more than 1% (10,000 ppm) were still being used.

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在清洁认证和纯水测试方面如何选择TOC的检测方式

在清洁认证和纯水测试的领域内,如何选择总有机碳(TOC)分析仪,需要考虑众多因素。不同的TOC分析仪制造商会使用不同的测试技术,从而对分析数据产生不同的影响,导致用户在选择上遇到困难。本文通过分析比较两种主要的TOC 检测技术——非分散红外(NDIR)与膜电导率,将为用户的不同需求提供选择建议。

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两种氧化方法测试NaCl样品中总有机碳含量

人们对海水中总碳及总有机碳的浓度一直很关心。目前市面上一些总有机碳(TOC)分析仪能够简单、直接地对样品进行分析,而且可以有效避免因样品中含有氯离子所带来的干扰问题。

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