共查询到20条相似文献,搜索用时 187 毫秒
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据中国计量网报道,一种能够对生活污水、江河湖泊水和工业污水进行自动监测、监控,被喻为高智能“警察”的新发明———顺序注射自动监测水中COD、氨氮和pH集成仪器,不久前由西安交通大学生命科学与技术学院研制成功并通过鉴定。目前我国的环保监测仪器基本上采用的还是实验室分析仪器,工作量大,取样率低,无法满足污染物总量控制的要求。该项目研制成功了国内第一台先进的水质自动监测仪样机,该集成仪器选用工控机系统,在软件上采用先进的数据处理技术,使仪器具有自动化程度高、抗干扰能力强、显示内容丰富等特点。我国首台水质自动监测仪在西安交大问世@林 相似文献
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根据《环境监测质量管理规定》、《江苏省环境监测质量管理实施细则》及环境监测技术规范的要求,探讨了降水监测采样、样品保存技术、实验室分析的质量控制方法。采用不同采样方法、不同采样器同时采集15场降水,其降雨量、电导率、pH值的比对监测结果合格率均大于90%。经试验,降水各组分有效保存时间不同,其中NO_3~-,NH_4~+为3 d;F~-,Cl~-,SO_4~(2-)为14d;K~+,Na~+,Ca~(2+),Mg~(2+)为30 d。选择2家实验室对降水样品、空白样品、标准样品同时测试,结果显示,空白测定结果均低于方法检出限,标准曲线相关性系数r≥0.999 0,测定结果的相对标准偏差为1.4%~5.9%(n=6),加标回收率为89.8%~106%,标准样品的分析结果均合格。该方法能保证降水监测结果准确、可靠,满足HJ/T 165-2004《酸沉降监测技术规范》的要求。 相似文献
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开发了一种基于流动注射双合并带铬黑T(EBT)-Ca(Ⅱ)络合消光光度法在线监测葡萄糖酸亚铁(Fe-Gla)合成的FIA系统,依据葡萄糖酸钙(Ca-Gla)、Fe(Ⅱ)型树脂为原料合成Fe-Gla的离子交换反应式(Ca(Ⅱ)+RFe■RCa+Fe(Ⅱ)),通过检测合成过程中的Ca(Ⅱ),实现了对Fe(Ⅱ)型树脂柱运行状态及产品中Fe-Gla含量的自动在线监测。对该系统的相关影响因素进行了优化:检测波长为660 nm、EBT浓度为280 mg/L、载流为NH3·H2O/NH4Cl(pH 12.4)的混合液。本方法测定Ca(Ⅱ)的线性范围为0~640 mg/L,对合成过程进行监测时,896 mg/L Fe(Ⅱ)、64 mmol/L H+对监测结果无影响。本方法实现了产品生产实时自动化监测分析,具有人为误差小、精度高(RSD≤0.53%,n=11)、分析速度快、试剂/试样用量少等特点。 相似文献
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The purpose of this study was to modify an automatic pre-concentration system to avoid water contamination and to apply this technique to ethane analysis in breath. The ion trap detector was very useful in monitoring the whole analytical procedure. 相似文献
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H. M. Andersen 《Journal of polymer science. Part A, Polymer chemistry》1969,7(10):2889-2896
By means of isothermal kinetic calorimetry, an automatic instantaneous record of polymerization rate can be obtained, independent of conversion. A large improvement in resolving kinetic events is thereby realized. Certain abrupt changes in rate due to electrolyte level have been observed. 相似文献
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An expert system for identification of parts of chemical molecules from IR and UV spectra is described. To develop the system,
the intelligent knowledge engineering program environment SCANKEE1 (elaborated at the Department of Computer Chemistry) was applied. The expert systems for identification of a chemical compound
described in the literature use hand-crafted knowledge bases. To eliminate the time-consuming writing of the rules, a module
for the automatic creation of rule knowledge bases was developed. The knowledge derives from the collection of molecular spectra
of organic compounds and their structural formulae. The algorithm for the automatic generation of the production rules (in
the rule knowledge base) is realized in two steps: (i) the creation of the correlation tables and (ii) the generation of the
production rules base.
Received: 1 July 1997 / Revised: 3 November 1997 / Accepted: 7 November 1997 相似文献
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用转换器和IBMPC/XT微机与Dionex2020i型离子色谱仪连接组成自动控制与数据处理系统,转换器由8031及8255等芯片组成,其功能是采集数据和转送数据,软件由汇编及C语言编制。这套新系统增加了注入/记录同步,分级梯度淋洗,自动连续进样等功能以及很强的数据处理能力。 相似文献
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Justyna Paluch Joanna Kozak Karolina Mermer Iwona Molda Marcin Wieczorek Sawomir Kalinowski Pawe Kocielniak 《Molecules (Basel, Switzerland)》2021,26(24)
Novel integrated flow-based steam distillation and titration system with spectrophotometric detection was developed for determination of volatile acidity in wines. Using the system, the distillation procedure was carried out in an automatic manner, starting with introducing into a heated steam distillation module a sample and subjecting it to steam distillation. Under selected conditions, all the analyte was transferred to the distillate; therefore, the system did not require calibration. The collected distillate and titrant were introduced into the next monosegments in varying proportions, in accordance with the developed titration procedure, and directed to the detection system to record the titration curve. The titration was stopped after reaching the end point of titration. Procedures for distillation and titration were developed and verified separately by distillation of acetic acid, acetic acid in the presence of tartaric acid as well as acetic acid, tartaric acid, and titratable acidity, with precision (relative standard deviation) and accuracy (relative error) for both procedures lower than 6.9 and 5.6%, respectively. The developed steam distillation and titration systems were used to determine volatile acidity in samples of white and rosé wines separately and as the integrated steam distillation and titration system, both with precision lower than 9.4% and accuracy better than 6.7%. 相似文献
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排水监测质量保证体系的建立 总被引:1,自引:0,他引:1
依据ISO9000质量管理标准和ISO/IEC17025标准,从排水监测管理的目标、技术要求及完善与提高三个方面论述了建立排水监测质量体系的方法和措施,以确保排水监测的各项质量活动能够科学、公正、适时、有效地开展,并对排水监测体系中各要素制定管理方法及控制措施,以不断完善排水监测的管理,提高排水监测质量水平。 相似文献