分光光度法测定环境水样中镁的研究

研究了4-(2-羟基-4-硝基苯偶氮)-1-苯基-3-甲基吡唑啉酮(HNAPMP)与镁的显色反应,在硼砂—氢氧化钠(pH=10)缓冲介质中,乳化剂-OP存在下,HNAPMP与镁反应生成2∶1稳定络合物,λmax为525nm,ε为3 63×104L·mol-1·cm-1。镁含量在0—0 8mg/L内符合比耳定律,方法用于环境水样中镁的测定,结果令人满意。     

气相色谱法中液体样品的进样技术

阐述了气相色谱中液体样品的4种进样技术。     

水中总磷和溶解性磷酸盐的快速分光光度法

在H_2SO_4溶液介质中,磷钼钒三元杂多酸与孔雀绿反应形成有色络合物,在波长620nm处表观摩尔吸光系数为1.73×10~5L/mol·cm,线性范围是0～0.4(mg/L).检测下限为0.016mg/L,方法准确、稳定,操作简便、快速.能够用于水中总磷和溶解性磷酸盐的测定.     

砷、汞、镉质控混合水样的配制

本文讨论了质控混合水样的配制方法,叙述了质控样品的均匀性、稳定性试验及定值的原则和方法,详实地列出了有关统计检验方法。在现有实验室条件下,可以配制出满足监测工作需要的质量控制样品。     

Review of environmental monitoring methods: survey designs

During the past decade and a half, environmental monitoring programshave increased in numberand importance. Large scale environmental monitoring programs often present design difficulties because they tend to measure many(sometimes hundreds) of parameters through space and time. Thispaper reviewed and summarized one important component of environmental monitoring programs, the statistical survey design. Survey designsused for long-term monitoring programs lasting multiple (3)occasions were reviewed, paying specialattention to those published after 1985. During this review, two key components of the overall survey design were identified. The first key component wasthe membership design. Groups of population units sampled the same occasionwere called panels here, and the membership design specified which units were members of which panels. The second component was the revisit design that specified when panels were to be revisited. Membership designs varied, butsome form of simple random or systematic design was popular.Among revisit designs, four basicpatterns were found in the literature and their relative strengths andweaknesses were summarized. To efficiently discuss revisit designs, anew unified short-hand notation was proposed and adopted.     

乙二醇在二氧化硫采样系统的应用探讨

在二氧化硫采样系统中,用乙二醇代替曝气处理的浓硫酸做干燥剂和去除空气中的尘粒和油污,方法更经济、简便、安全。     

环境中硝酸盐和亚硝酸盐测定方法研究进展

对近年测定环境样品中硝酸盐和亚硝酸盐光度法，催化动力学法、极谱法，色谱法的研究进展和方法测定参数以及方法的适用范围进行了简单评述。     

水质质控样的制备与应用

水质质控样的制备与应用汪小梅，沈叔平（杭州市环境监测中心站３１０００７）ＰｒｏｐａｒａｔｉｏｎａｎｄＡｐｐｌｉｃａｔｉｏｎＷａｔｅｒＱｕａｌｉｔｙＣｏｎｔｒｏｌＳａｍｐｌｅｓ￥ＷａｎｇＸｉａｏｍｅｌ；ＳｈｅｎＳｈｕｐｉｎｇ（ＨａｎｇｚｈｏｕＥｎｖｉｒ...     

固体进样无焰原子吸收法直接测定树叶中的铬

设计了一种简便,实用的固体进样装置,进行无焰原子吸收测定树叶中的痕量铬.建立了一种准确快速测定树叶中微量元素的方法,适合于常规环境试样分析.特证质量0.9Pg/0.0044A,回收率95-98％,变异系数5.1-5.7％.     

微波辅助溶样方法中的问题与对策

较详细地评述了微波辅助溶样技术在实际应用中存在的挥发物渗透损失、记忆效应、残留物现象及安全操作等问题，以及实际操作对策，以期对分析人员在建立与使用微波制样方法时有所裨益。