关于FD—61K型自然伽玛测井仪换算系数的定值问题

本文讨论了FD-61K型自然伽玛测井仪的换算系数K′_0,并确认换算系数K_0应为115.6±3μR/h。     

沿海软粘土取土质量的对比分析

本文在简要介绍固定活塞式薄壁取土器取土技术基础上，详尽分析了在连云港、赤湾港和广深路所进行的软粘土取土技术对比试验结果。试验结果表明，土样扰动对于室内所测定的力学性指标影响极大，但对物理性指标影响不大。研究结果还有力地证明，只要操作正确，采用薄壁取土器能取得高质量土样，而采用敞口式厚壁取土器取出的土样扰动较大。     

单分子层浸渍树脂的制备,特点及其在分析中的应用

本文讨论了单分子层浸渍树脂制备的理论基础和实验制作技术;描述了单分子层浸渍树脂的主要特点:萃取剂在支持体上的有效荷载、柱效率高、萃取剂不易流失、制作容易等;以单分子层TRPO浸渍树脂为例,介绍了它们在分析中的应用。     

Evaluating the effectiveness of heavy liquid density separation in isolating K-feldspar grains using alluvial sediments from the Hajar Mountains,Oman

Heavy liquid density separation is commonly utilised in isolating specific minerals from bulk sediment for luminescence dating. K-feldspars are commonly separated from other minerals by isolating the <2.58 g cm⁻³ fraction which yields infrared stimulated luminescence (IRSL) signals conducive to dating. However, initial measurements of the IRSL and thermoluminescence (TL) signals from the <2.58 g cm⁻³ fraction of alluvial fan sediments from the Hajar Mountains, northern Oman, were atypical of K-feldspar luminescence signals reported in the literature. In this study, three different density separates (<2.58 g cm⁻³, 2.58–2.54 g cm⁻³ and <2.565 g cm⁻³) were trialled to attempt to isolate pure K-feldspar samples for dating, to measure K-feldspar IRSL signals which are not contaminated with inputs from other feldspar, quartz and/or heavy mineral signals. The mineralogy of these separates was explored using microscopy, X-ray diffraction and mass spectrometry. We found that despite more refined heavy liquid density separation, the proportions of K-feldspar in these separates had a maximum of 40% by weight, remaining significantly contaminated by other minerals. IRSL and TL signals were atypical of K-feldspar for all density separates and it is likely that there is a contribution of signal from IR-sensitive contaminants, such as muscovite. This highlights the importance of investigating the mineralogy of samples for luminescence dating, especially in regions where little prior work has been undertaken.     

氢氧化锂制备工艺研究进展

文章简要介绍了氢氧化锂的性质、应用以及锂资源现状,重点论述了氢氧化锂的生产工艺及其研究进展,分析了各种制备工艺的优劣及应用特点,指出了氢氧化锂制备工艺未来发展趋势。     

Determination of Precious Metal Concentrations in a Polymetallic Nodule Reference Sample from the Indian Ocean by ICP-MS

A polymetallic nodule reference sample (No. 2388)collected from the Indian Ocean, and seven other samples, two from the United States Geological Survey, USA (Nod-A-1 and Nod-P-1), three from Russia (OOPE 601, OOPE 602, and OOPE 603), and two from China (GSPN-2 and GSPN-3), collected from different loca tions, are available for calibration purposes and as control samples in the analytical programs for polymetallic nodules and associated sediments to ensure accurate measurements. They are not certified for precious metal concentrations, however, and the data available are very scanty. An attempt has been made to provide working values for platinum, palladium, gold, and silver and indicative values for osmium, iridium, and ruthenium in these eight ferromanganese nodule reference samples, using inductively coupled plasma mass spectrometry (ICP-MS). To assess the accuracy of the method, certified reference materials, WPR-1, WMS-1, WMG-1, and WGB-1 Canadian Certified Materials Project (CCRMP, Canada) were analyzed, and the data obtained were compared with the certified values. The estimate of analytical reproducibility was found to be better than 15 % RSD for most elements with comparable accuracy. The data presented for this set of manganese nodule reference samples may be useful in geochemical studies of manganese nodules and associated sediments.     

工业X—CT的数据采集系统

本文简要介绍了一种工业Ｘ－ＣＴ的数据采集系统的新方法－同时采集分时转换法，它可以保证各通道的采样在同一时刻进行，从而消除了时间累积偏移误差。     

聚醚多元醇羟值测定中称样量的影响

在生产聚氨酯类海洋防腐涂料时，常用聚酸多元醇作主要原料．本文讨论在测定聚醚多元醇的羟值时，称样量对测定结果的影响，如何通过控制称样量而快速准确地得到测定数据．分析指出，控制称样量，使样品与空白的滴定差值在４～１１ｃｍ２变化时，可得到准确的测定结果，测定误差小于１×１０－２。     

介形虫碳氧同位素测定样品处理方法对比研究

介形虫化石壳体被认为是反映古湖泊沉积环境的理想对象。在过去的30年,介形虫壳体的δ13C和δ18O测定已经被广泛应用到湖泊沉积古气候及古环境的重建。由于湖泊生物碳酸盐样品不同的前处理方法可能会影响到稳定同位素测试结果的重现性和辨析率以及实验室之间数据的可比性,采用有效的方法对介形虫壳体进行预处理是保证介壳稳定同位素测试的一个关键环节。在总结目前常用的湖泊生物碳酸盐稳定同位素测试样品处理方法的基础上,通过对青海湖现代和古代沉积物中介形虫的测定,讨论各种处理方法对介形虫壳体稳定同位素测试结果(δ13C和δ18O)的影响。实验表明:不同处理方法对所测介壳样品的δ13C值和δ18O值不会产生大的影响,在介壳样品的稳定同位素测试之前不需要对介壳样品进行处理。     

硼酸镁晶须的制备及生长机理初探

以六水氯化镁、硼砂为反应物,氯化钾作助熔剂,通过高温助熔剂法在不同镁硼配比区域制备出尺寸和形貌不同的硼酸镁晶须,直径0.5～20μm,长30～500μm。镁硼摩尔比例1∶1～1∶4之间的对比实验结果为只在n(Mg):n(B)=1∶2～1∶4时,生成烧结块表层晶须;随着硼比例的增高,底部晶须的长径比增大。这表明高硼配比对硼酸镁晶须的完全生长至关重要;并推测硼酸镁晶须的生长机理可能为SLS机理。