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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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纯水和注射用水中总有机碳含量测定

水,尤其是纯水(PW)和静脉注射用水(WFI)在制药行业起着至关重要的作用,生产和保证水的清洁度需要严格的质量控制和精确的分析方法,美国药典(USP)和日本药典(JP)已经将总有机碳(TOC)分析用于验证PW和WFI清洁度的标准之一。

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采用静压浓度分析技术的高温总有机碳(TOC)分析仪对盐水进行分析

海水中有机碳快速分析的需要越来越多,由于海水具有复杂的基体,导致在分析的过程中对仪器消耗较大,维护成本也的所增加,所以对此方法的研究具有较大挑战性,本方法主要是针对解决以上的问题而开发的对海水中有机碳快速分析。

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