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离子色谱 - Open Access .click
Results 21 to 30 of about 3,838 (92)

离子色谱法同时检测工业废水中的多种芳香酸

open access: yesGongye shui chuli, 2017
采用抑制电导离子色谱方法,同时测定了工业废水中苯甲酸、对苯二甲酸、对甲基苯甲酸、苯磺酸、对甲基苯磺酸5种芳香酸。工业废水稀释一定倍数后,经0.22 μm的过滤头和RP前处理柱处理后进行离子色谱分析。使用阴离子交换色谱分离,抑制器电导检测模式。5种芳香酸在3~40 mg/L范围内呈良好的线性,检出限低,加标回收率范围合理、操作简单、灵敏度高、重复性好、无污染,应用于工业废水中芳香酸污染物的监测,结果令人满意。
绍嵘   +5 more
doaj   +2 more sources

Determination of anions in the water reducing agent by ion chromatograph(离子色谱法测定减水剂中的阴离子)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2016
建立一种离子色谱法同时测定减水剂中的葡萄糖酸根、氯离子、硫酸根、硫代硫酸根.样品经过稀释、C18小柱预处理后直接进样.选用shodex 52-4e阴离子交换柱分离样品,淋洗液为3.6 mmol•L-1 N2CO3,柱温50 ℃,流速0.8 mL•min-1,进样量7 µL,抑制电导检测,外标法定量,当葡萄糖酸根、氯离子、硫酸根、硫代硫酸根的质量分数分别为5.0〜100.0,0.1~30.0,1.0~50.0,1.0~50.0 mg·L-1时,与色谱峰面积呈良好的线性关系(r≥0.999 1 ...
ZHUBinhe(朱彬和)   +4 more
doaj   +1 more source

Purification of Cry1Ab protein by multi-cycles ion-exchange chromatography and its peptide mass mapping(多次循环离子交换色谱纯化Cry1Ab蛋白及其肽质量谱图的分析)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2007
采用Q-Sepharose FF离子交换柱对初步纯化的Cry1Ab杀虫蛋白样品进行了多次循环精细纯化,洗脱模式为离子强度台阶梯度,流动相为Tris-HCl缓冲液加NaCl,盐浓度从0.1 mol •L-1变化到1.0 mol • L-1.结果表明,Cry1Ab蛋白在NaCl浓度为0.4 mol • L-1时从柱上被洗脱,并与杂蛋白很好地分离.色谱分离机制符合顶替色谱机制.经3次循环分离后可获得高纯度的Cry1Ab蛋白,用SDS-PAGE分析了蛋白的纯度及表观分子量,电泳胶上分离的蛋白进行原位酶切后 ...
LUANMing-ming(栾明明)   +2 more
doaj   +1 more source

工业循环冷却水及锅炉水中F-、Cl-、NO2-、PO43-、NO

open access: yesGongye shui chuli, 1995
介绍了离子色谱法分析工业循环冷却水及锅炉水中各项阴离子的具体步骤和研究结果。
蒋仁依, 邵维仁
doaj   +2 more sources

Analysis of burdock polysaccharide components by high performance anion exchange chromatography coupled with pulsed amperometric detection(牛蒡多糖组分的高效阴离子交换-脉冲安培分析)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2014
应用高效阴离子交换色谱-脉冲安培检测器联用技术,研究了牛蒡多糖组分的检测方法和条件.以牛蒡为原料,采用水提醇沉法提取牛蒡粗多糖,并对其工艺进行探讨.牛蒡粗多糖经超声波酸水解处理后进行离子色谱分析,其最佳色谱条件为:以12 mmol • L-1 NaOH溶液为淋洗液,流动相流速为1. 0 mL • min-1,Carbo PaC PA10 (250 mm×4 mm i.
ZHENGYimei(郑一美)   +4 more
doaj   +1 more source

Quick Determination of Contents of Malachite Green and it's Metabolites in Fresh Fish Meat by HPLC-MS/MS(HPLC-MS/MS法快速测定鲜鱼肉中孔雀石绿及其代谢物含量) [PDF]

open access: yesShipin kexue jishu xuebao, 2014
A method was established for the determination of contents of malachite green and it's metabolites in fresh fish meat by HPLC-MS/MS.The electrospray positive-ion mode was applied for ionization and the selective ion monitoring mode (SRM) was used for ...
ZONG Wanli(宗万里), LU Gang(鲁 刚)
doaj   +1 more source

电厂水汽系统有机物含量对氢电导率影响试验研究

open access: yesGongye shui chuli, 2016
为探索电厂水汽系统中有机物含量对氢电导率的贡献值,在测定机组水汽有机物含量的同时,进行了水样离子色谱分析。根据离子色谱数据可以理论计算出水汽中无机离子变化对氢电导率的贡献,从而间接计算出有机物分解对氢电导率的贡献。分析表明:上述方法计算出的结果与实际值相符,水汽中的有机物对氢电导率存在较大影响。
金绪良   +5 more
doaj   +2 more sources

工业水中氯离子测定方法的进展

open access: yesGongye shui chuli, 2007
氯离子含量是评价锅炉给水、炉水、循环冷却水以及蒸汽品质的主要指标。作者综述了近年来工业水中氯离子的各种测定方法及应用。包括:分光光度法、比浊法、原子吸收法、极谱法、电导法、离子选择电极法、离子色谱法和流动注射分析法等。不仅对各种测定方法的基本原理进行了说明,而且对许多典型分析系统进行了阐述、比较和评论。
李永生, 郭慧
doaj   +2 more sources

尖顶羊肚菌菌丝体胞外多糖的分离纯化及结构研究

open access: yes四川大学学报. 自然科学版, 2013
用乙醇沉淀、Sevag法除蛋白等方法得到羊肚菌菌丝体胞外粗多糖,并进一步通过离子交换色谱、分子筛色谱对粗多糖进行分离纯化,得到单一多糖组分MEP3A.经外光谱法、紫外光谱法、核磁共振法等仪器分析方法确定该多糖组分结构为直链→6)-α-D-Man p-(1→,分子量81.2kDa,不含蛋白质、多肽和氨基酸.采用MTT法检测表明,该多糖组分可促进小鼠脾淋巴细胞增殖,具有免疫调节活性.
余梦瑶   +5 more
doaj  

离子色谱法测定工业污水中的氰化物

open access: yesGongye shui chuli, 1989
采用GDX102树脂和阳离子交换树脂分离吸附工业废水样品中的有机物和重金属离子,然后用电流检测器离子色谱法测定工业废水中的氰化物。最低检出浓度为0.5微升/升,相对标准偏差为3.94~7.41%,回收率为90~101.5%。
王永强
doaj   +2 more sources

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