Preparation and Certification of Biogeochemical Reference Materials

The Institute of Geophysical and Geochemical Exploration in China recently prepared ten biogeochemical certified reference samples GSB1‐10 (CRMs). The samples are primary agricultural products such as rice, wheat, corn, soybean, cabbage, spinach, tea, powder, chicken and apple. Lyophilisation technology and a high‐alumina ball mill were used to process the samples. Fourteen laboratories and hundreds analysts in China participated in the certification analysis. Over ten reliable analytical methods, predominately ICP‐MS, ICP‐AES and INAA, were used for analysing the samples for fifty‐nine elements. A total of 22477 determinations led to 5136 average data sets. Certified values of fifty‐four elements were assigned.     

中国有机农业认证信息中心空间组织特征及影响度评析

随着我国食品安全、环境压力、三农问题、绿色贸易壁垒等问题的加剧,有机农业作为一种可持续的新型农业发展模式,为以上问题的解决提供了新的范式。有机农业认证作为连接有机农业生产者与消费者的纽带,是有机农业生产链的核心构成之一。有机农业认证体系是我国有机农业生产网络中信息网络的重要组成部分,有机农业认证机构作为信息网络的核心构成,对认识我国有机农业信息网络的结构与组织有着积极的作用。本文基于对有机认证机构为代表的信息中心的空间分布、组织与影响腹地范围分析,认为我国目前有机农业信息中心空间分布呈较强的不均衡性特征,且发育程度具有一定的等级层次性。采用层次分析法进一步对中国有机农业认证信息中心的影响度进行评析,分析表明我国有机认证信息中心分为三大综合等级。此外,选取以北京、浙江和辽宁为代表的重点地域空间进行探讨,并针对不同等级的有机农业认证信息中心提出相应的发展策略和建议。     

Incorporating carbon footprints into seafood sustainability certification and eco-labels

The seafood industry has become increasingly interconnected at a global scale, with fish the most traded commodity worldwide. Travel to the farthest reaches of the oceans for capture is now common practice, and subsequent transport to market can require hundreds to thousands of miles of travel by sea and air. Refrigeration of seafood products is generally required at all stages of the journey from ocean to dinner plate, resulting in substantial energy expenditure. Energy input for aquaculture (including mariculture) products can also be high, namely due to the large amounts of feed required to support fish growth. As a result of these factors, the seafood industry has a substantial carbon footprint. Surprisingly, however, carbon footprints of seafood products are rarely integrated into assessments of their sustainability by eco-labels, sustainability certification, or consumer seafood sustainability guides. Suggestions are provided here for how carbon footprints could be incorporated within seafood sustainability schemes.     

实行矿产品准运证制度全面推动地矿行政工作

本文较详尽的阐述了娄底市地质矿产局建立的矿产品准运证制度规范体系、指出开展矿产品“两证一查”工作的意义和成效。     

Strengthening Certification Guidelines

Abstract

The teacher certification process is complex, confusing, and important. After explaining the fundamentals of certification, this article suggests pragmatic strategies geographers can use to influence state certification procedures and requirements. The most effective way to change certification guidelines in order to require more geography for preservice teachers may be to change the problems certification guidelines are intended to solve. However, it is important to remember that more geography and better education are not synonymous phrases.     

X射线荧光光谱法在有色金属矿石标准物质定值分析中的应用

报告了X射线荧光光谱法在铜矿、铅矿、锌矿、钨矿和钼矿标准物质定值分析中的应用。样品用低倍稀释熔融法在热解石墨坩埚中熔融,用人工标样进行校准,计算了COLA方程的理论影响系数,所有分析元素全部用理论影响系数法校正吸收-增强效应。分析结果与不同实验室不同分析方法的结果相吻合。     

莒县宅基地土地登记发证工作探索

莒县积极探索农村宅基地登记发证工作方式,通过简化确权表格,做好变更、注销登记等工作,提高了工作效率和质量,进一步明晰了农村土地产权,维护了农民和农村集体经济组织的合法权益,促进了社会和谐和新农村建设的顺利开展。     

An Evaluation of Methods for Assessing the Competence of Laboratories Based on Performance in the GeoPT Proficiency Testing Scheme

The original certification protocol, published by the International Association of Geoanalysts in 2003, specified that the competence of laboratories selected as competent to contribute certification measurements should be evaluated from their performance in the GeoPT proficiency testing programme. Round 39 of the IAG GeoPT proficiency testing programme provided an opportunity to examine four methods of evaluating laboratory competence based largely on the use of proficiency testing z‐scores as performance indicators. This opportunity arose because two test materials were co‐analysed by participating laboratories in this round: a syenite, SyMP‐1, supplied by the USGS, and an established CRM, the nepheline syenite, CGL 006. The performance of laboratories was assessed in four ways; in each case, consensus values and their uncertainties as derived from selective data sets of competent laboratories were compared with results derived from the routine GeoPT data assessment, involving all submitted measurements. An overall comparison of results showed no significant statistical differences in either consensus values or uncertainties between these data sets. This conclusion was unexpected and calls into question the widely held assumption that ‘better’ consensus data would be obtained from a subset of laboratories judged to be competent on the basis of proficiency testing performance indicators.