高效液相色谱法同时测定大豆中10种磺酰脲类除草剂的残留量

首次建立了同时检测大豆中10种磺酰脲类除草剂(环氧嘧磺隆、噻吩磺隆、甲磺隆、醚苯磺隆、氯磺隆、苄嘧磺隆、氟磺隆、吡嘧磺隆、氯嘧磺隆和氟嘧磺隆)多残留量的反相高效液相色谱(RP-HPLC)方法。样品经乙腈提取、正己烷液-液分配、Florisil填充柱净化后,采用RP-HPLC-二极管阵列检测器检测(DAD)法测定,外标法定量。对样品前处理和色谱分离条件进行了详细的研究和优化。10种磺酰脲类除草剂的质量浓度在0.1~10.0 mg/L范围内其浓度与峰面积的线性关系良好,相关系数为0.9996~0.9997;在     

磺丁基醚-β-环糊精手性流动相添加剂法拆分佐匹克隆对映体

采用磺丁基醚-β-环糊精(SBE-β-CD)为手性流动相添加剂,建立了反相高效液相色谱手性流动相添加剂法拆分分离佐匹克隆对映体的方法。在普通C18色谱柱(250 mm×4.6 mm×5.0μm)上,考察了水相pH、磺丁基醚-β-环糊精浓度、磷酸盐缓冲液浓度、甲醇含量、柱温等对佐匹克隆对映体拆分效果的影响。确定最适用的色谱条件:流动相为水相(5 mmol/L NaH2PO4,含磺丁基醚-β-环糊精5 mmo/L,以H3PO4调pH为3):甲醇=78:22(V/V),检测波长305nm,流速为1 mL/min,柱温为30℃,此条件下佐匹克隆对映体的保留时间分别为23.0和25.6 min,分离度为1.81。两对对映体质量浓度在0.04~0.36g/L范围内线性关系良好(r≥0.9990),保留时间的RSD分别为0.73%和0.80%,峰面积的RSD分别为1.2%和1.1%。     

高效液相色谱法测定人血清中5-氟尿嘧啶浓度

建立了测定人血清中5-氟尿嘧啶的反相高效液相色谱法。采用ZorbaxODS柱4.6mm×250mm,预柱YWG-C184.6mm×50mm;甲醇:水（20:80）为流动相,紫外检测波长为273um,喃氟啶为内标定量。回收率为96.85％,田间和日内变异系数分别为537％和438％,血清中最低检测浓度为10μg／L。在0.04～50mg／L浓度范围内线性良好,相关系数为0.9990。     

高效液相色谱-串联质谱法测定茶叶、三七中胺苯磺隆和甲基胺苯磺隆的残留量北大核心CSCD

建立了测定茶叶、三七中胺苯磺隆和甲基胺苯磺隆残留量的高效液相色谱-串联质谱法。样品经超纯水浸泡,乙腈提取,QuEChERS净化,Phenomenex Kinetex C 18色谱柱(50×2.1 mm,2.6μm)分离,液相色谱-串联质谱法检测,基质匹配外标法定量。胺苯磺隆和甲基胺苯磺隆在1.0 ng/mL~100 ng/mL范围内线性关系良好,相关系数R均大于0.999,方法的检出限(S/N=3)为0.07μg/kg~0.20μg/kg,定量限(S/N=10)为0.21μg/kg~0.60μg/kg。在5μg/kg~100μg/kg范围的回收实验中,胺苯磺隆平均回收率为70.8%~108.1%,相对标准偏差(RSD,n=6)为3.3%~11.4%;甲基胺苯磺隆平均回收率为70.2%~105.5%,RSD(n=6)为2.9%~10.6%。本方法前处理简单、稳定、灵敏,适用于茶叶、三七中胺苯磺隆和甲基胺苯磺隆残留量的同时测定。     

高效液相色谱法测定玉米淀粉中禁用的脲类农药

应用高效液相色谱法（HPLC）测定了玉米淀粉中3种禁用的脲衍生物农药,即氯磺隆、枯草隆及定虫隆。试样中的上述农药用甲醇超声萃取,所得萃取液经蒸发并用氮气吹干后溶于1mL甲醇中供HPLC测定用。用ZORBAX Eclipse XDB-C18色谱柱（2．1mm×150mm,5μm）作为固定相,并用不同比例配成的乙腈和水的混合液作为流动相进行梯度淋洗,采用220nm波长的列阵二极管检测器进行检测。3种农药的线性范围均在0．2～100．0mg·L^-1范围内,方法的检出限（S／N=3）为0．04mg·kg^-1（氯磺隆）,0．03mg·kg^-1（枯草隆）及0．01mg·kg^-1（定虫隆）。以玉米淀粉样品作基体用标准加入法作方法回收试验和精密度试验,测得上述3种农药的平均回收率（n=5）依次为92．0％,93．4％及95．9％;相对标准偏差（n=6）依次为3．5％,2．7％及3．8％。     

分子印迹固相萃取-高效液相色谱法同时检测烟叶中磺酰脲类农药残留

以氯磺隆（CS）为模板分子,甲基丙烯酸为功能单体,三羟甲基丙烷三甲基丙烯酸酯为交联剂,在二氯甲烷氛围中,经沉淀聚合制备氯磺隆分子印迹聚合物（CS-MIP）微球。将该聚合物微球作为填料制得分子印迹固相萃取柱用于样品前处理,建立了分子印迹固相萃取-高效液相色谱（MIP-SPE-HPLC）同时检测烟叶中6种磺酰脲类除草剂残留的分析方法。针对氯磺隆、甲磺隆、苄嘧磺隆、苯磺隆、胺苯磺隆和烟嘧磺隆6种磺酰脲类除草剂,在烟叶中加标0.50~50 μg/g,经氯磺隆分子印迹固相萃取柱（CS-MIP-SPE）净化和富集,高效液相色谱（HPLC）检测,其平均回收率为77.60%~102.05%,相对标准偏差为0.16%~7.07%,检出限为0.08~0.46 μg/g。将MIP-SPE-HPLC方法用于实际农药残留检测,结果表明可同时满足烟叶中多种磺酰脲类除草剂残留量的检测要求。     

水体中甲硫嘧磺隆残留量的高效液相色谱法检测

采用Kromasil C18不锈钢柱(250mm×4.6mm i.d.,5μm),以V(甲醇)∶V(水)=70∶30混合溶剂为流动相(pH用H3PO4调至3.0),流速1.0mL/min,检测波长236nm和柱温35℃,建立了不同水体中甲硫嘧磺隆残留的样品处理方法和高效液相色谱分析方法。甲硫嘧磺隆在0.25~10mg/L范围内,其峰面积(Y)与质量浓度(ρ)呈现良好的相关性,其线性回归方程为Y=4425.9ρ 5664.8,R2=0.9997。在纯净水、池塘水、河水、稻田水A和稻田水B中,甲硫嘧磺隆5个添加浓度水平的平均回收率分别为92.80%~101.53%、92.54%~103.10%%、94.11%~97.57%、92.91%~101.25%和84.94%~92.53%,RSD分别为0.43%~4.1%、0.85%~6.5%、0.37%~7.0%、0.56%~7.7%和1.4%~4.7%,检出限(LOD)为1.50×10-9g(S/N=3)。可用于环境水样中甲硫嘧磺隆的残留量检测。     

反相高效液相色谱法测定改性单基发射药中的N，N-二苯基-N＇-甲基脲素

建立了反相高效液相色谱测定改性单基发射药中N,N-二苯基-N＇-甲基脲素（AKⅡ）含量的方法。采用ODS色谱柱（150mm×4．6mm,5μm）,选用甲醇-水（体积比60：40）体系为流动相,检测波长为220nm,流速为1mL／min,柱温为室温,用水析法进行紫外检测定量测定。结果表明,AKⅡ浓度在0．09～0．5mg／mL范围内与色谱峰面积比值（分析物：内标）呈良好的线性关系,线性方程为y=65．058x＋0．0439,相关系数t=0．9989。测定结果的相对标准偏差为1．10％（n=8）,加标平均回收率为99．77％。采用内标法测定改性单基发射药中N,N-二苯基-N＇-甲基脲素的含量,结果准确可靠,操作简单实用。     

氯磺隆的高效液相色谱分析方法研究

本文研究了用高效液相色谱法测定新型除草剂氯磺隆含量的方法,在反相ODS柱上,用甲醇—水作流动相进行洗脱,紫外225nm检测,以萘作内标定量,方法快速、灵敏、准确,氯磺隆的最小检出量为0.8ng,变异系数为1.4%,回收率为100.7%,一次分析仅需3分钟。     

HPLC法测定鸡精中谷氨酸钠的含量

以邻苯二甲醛与谷氨酸钠中的氨基进行柱前在线衍生化反应,采用C18色谱柱分离、荧光检测器（激发340nm,发射450nm）进行测定,建立了柱前衍生反相高效液相色谱测定鸡精中谷氨酸钠含量的方法。该方法相对标准偏差为0．69％,加标回收率为99．1％～101％,在0．10~50．0mg／L范围内,谷氨酸钠的峰面积和浓度之间的相关系数为0．9999,保留时间和峰面积的相对标准偏差分别为1．22％和0．71％,鸡精中谷氨酸钠定量下限为0．2μg／g。     

Determination of pesticides in soil samples by supercritical fluid chromatography-atmospheric pressure chemical ionisation mass spectrometric detection

This paper presents an analytical technique for the determination of pesticides in soil by packed-column supercritical fluid chromatography interfaced with atmospheric pressure chemical ionisation mass spectrometry (pSFC-APCI-MS). The technique provides a versatile method for the detection and quantification of pesticides belonging to three different commonly used classes, triazines (ametryne, atrazine), carbamates (carbofuran) and sulfonylureas (chlorsulfuron, metsulfuron methyl and benzsulfuron methyl). The APCI mass spectra for all the pesticides studied consisted of protonated molecule ions as the most abundant ion at low cone voltages, except for metsulfuron methyl and benzsulfuron methyl, which gave a fragment ion as the most abundant ion with the protonated molecule ion at low intensity. Increasing the cone voltage provided informative fragmentation patterns for all species. The technique shows good linearity over the concentration range of 0.1-50 micrograms ml-1, with r2 values as follows: atrazine 0.997, ametryne 0.995, carbofuran 0.999, benzsulfuron methyl 0.999, chlorsulfuron 0.995 and metsulfuron methyl 0.997. The detection limits in the selected ion mode were atrazine 201, ametryne 144 and carbofuran 385 pg, which were calculated by using the standard solution, and benzsulfuron methyl 2.045, chlorsulfuron 1.435 and metsulfuron methyl 2.414 ng, which were determined by using spiked soil samples. The pSFC-MS system was shown to have a high degree of reproducibility. The technique was then applied to the determination of the above pesticides in soil samples. The results obtained show that there is no matrix effect from the soil and that the detection limits for all pesticides in soil were similar to those found for the standard solutions.     

离子排斥色谱法同时测定葡萄糖醛酸和内酯及葡萄糖醛酸稳定性

建立了同时检测葡萄糖醛酸和葡萄糖醛酸内酯的离子排斥色谱法。 采用Boston HC-B75 H+色谱柱进行分离,以5 mmol/L H2SO4水溶液为流动相,流速0.6 mL/min,柱温25 ℃,紫外检测波长220 nm;根据外标法定量,葡萄糖醛酸和内酯分别在10～1200 mg/L和5～600 mg/L范围内线性良好（r＞0.9999）;葡萄糖醛酸、葡萄糖醛酸内酯的最低检测限及定量限均分别为0.1和0.3 mg/L,精密度实验RSD分别为1.00%和0.35%,平均回收率分别为99.69%和98.21%。 该检测方法简便、快速、灵敏,可用于葡萄糖醛酸和葡萄糖醛酸内酯的同时测定。 温度、pH值和溶剂对葡萄糖醛酸稳定性有影响,可为葡萄糖醛酸的分析与制备研究提供参考依据。     

Development and validation of a solid-phase extraction method coupled to high-performance liquid chromatography with ultraviolet-diode array detection for the determination of sulfonylurea herbicide residues in bovine milk samples

This study proposes a fast, simple and sensitive liquid chromatography diode array detector (LC/UV-DAD)-based method for the simultaneous determination of eight sulfonylurea herbicides (bensulfuron methyl, chlorsulfuron, metsulfuron methyl, primisulfuron methyl, rimsulfuron, thifensulfuron methyl, triasulfuron and tribenuron methyl) in bovine whole milk at concentrations lower than the default limit of 0.01 mg kg(-1) allowed by current legislation (Regulation EC/396/2005 and following Annexes). An effective one-step solid phase extraction (SPE) and clean up procedure was defined with use of Chem Elut cartridges, providing good recoveries for all the analytes tested and with no matrix effects affecting method accuracy. Separation of herbicides was obtained on a C(18) column by acetonitrile- water gradient elution. Method validation has been performed according to European Commission Decision 2002/657/EC criteria, in terms of linearity, recovery, precision, specificity, decision limit (CC(α)) and detection capability (CC(β)). Typical recoveries ranged between 78.4% and 99.7%, at the maximum residue limits (MRLs) levels established by Regulation EC/396/2005, with relative standard deviations (RSD) no larger than 10%.     

反胶束萃取-高效液相色谱法测定磺酸型偶氮染料

建立了水中磺酸偶氮染料甲基橙（MO）、刚果红（CR）和酸性铬兰K（ACBK）的反胶束萃取-离子对高效液相色谱定量检测的方法。采用Hypersil C18柱（250×4．6mm,5μm）,流动相为V（甲醇）／V（水）=63：37（含10mmol／L的KH2PO4、4mmol／L的四丁基溴化铵,KOH调pH=7．0）,流速为0.8mL／min,MO、CR和ACBK检测波长分别为449nm、505nm和526nm。结果表明,染料的回收率为92．9％～102．1％,相对标准偏差为0．9％～2．3％,水中MO、CR和ACBK的检出限分别为0．6μg／L、1．2μg／L和1．3μg／L。     

高效液相色谱-内标法测定碘硝酚原料及其注射液中碘硝酚的含量

建立了碘硝酚的高效液相色谱(HPLC)-内标法检测方法。用甲醇将样品配制成测试浓度后过滤,经依利特Sino Chrom C_(18)(4.6 mm×200 mm,5μm)色谱分析柱进行色谱分离,流动相为0.02 mol/L磷酸二氢钾溶液(pH 2.6)-甲醇(30∶70),流速为1 mL/min,紫外检测波长为235 nm,柱温为30℃,内标物为硝氯酚,进样量为20μL。结果表明,碘硝酚的质量浓度在20~120 mg/L范围内呈线性关系,相关系数(r)为0.999 6;在3个不同浓度(64、80、96 mg/L)加标水平下,平均回收率为90.4%~98.2%,相对标准偏差(RSD)为0.18%~0.72%;检出限(LOD,S/N=3)为0.15 mg/L,定量下限(LOQ,S/N=10)为1.5 mg/L。该方法的精密度、稳定性以及重复性良好,且操作简便,结果准确,可用于碘硝酚原料药及注射液的含量测定。     

Analysis of carbamazepine and its active metabolite, carbamazepine-10,11-epoxide, in human plasma using high-performance liquid chromatography

A sensitive method based on high-performance liquid chromatography (HPLC) with ultraviolet (UV) detection was developed for the determination of carbamazepine (CBZ) and one of its active metabolites, carbamazepine-10,11-epoxide (CBZ-E) in human plasma. CBZ, CBZ-E and the internal standard (IS) 10,11-dihydrocarbamazepine were extracted from human plasma into methyl tert-butyl ether. CBZ, CBZ-E and the IS were successfully separated on an RP C18 column with a mobile phase of acetonitrile:methanol:water (18:19:63, v/v/v) and monitored via UV detection at 210 nm. The calibration curves were linear over the concentration ranges of 0.01–10 μg/mL for CBZ and 0.005–5 μg/mL for CBZ-E in human plasma, respectively. The method displayed excellent sensitivity, precision and accuracy, and was successfully applied to the quantification of CBZ and CBZ-E in human plasma after oral administration of a single 200 mg CBZ CR tablet. This method is suitable for bioequivalence studies following single doses given to healthy volunteers.     

高效液相色谱法测定番茄酱中辛硫磷残留

建立了高效液相色谱(HPLC)法测定番茄酱中辛硫磷残留量的方法。番茄酱样品经乙腈提取盐析,弗罗里硅土固相萃取小柱净化,样液浓缩过滤膜后用乙腈溶解定容。采用C18色谱柱,流动相为体积比4∶1的乙腈∶0.15%甲酸水溶液,检测波长285nm,外标法定量。结果表明:在0.01～1mg/kg范围内辛硫磷的线性关系良好(r=0.9999)。方法检出限为0.01mg/kg,平均回收率为86.1%～102.7%,相对标准偏差为2.0%～6.5%。该法简便、快速、灵敏、准确,各项技术指标均满足农药残留检测的要求。     

高效液相色谱法测定食品模拟物中十二内酰胺的研究

建立了食品模拟物中十二内酰胺的高效液相色谱测定方法。采用Acclaim C18色谱柱,以水-乙腈为流动相,梯度洗脱,于波长210nm处进行测定。在优化条件下,水基食品模拟物和橄榄油的线性范围分别为1.0～20.0mg/L、1.0～20.0mg/kg,检测限分别为0.5mg/L和0.5mg/kg,回收率为93%～105%。该方法可满足食品模拟物中十二内酰胺的测定。     

LC of sulfonamide residues in poultry muscle and eggs extracts using fluorescence pre‐column derivatization and monolithic silica column

A new, rapid, sensitive and selective HPLC method with fluorescence detection is described for the simultaneous determination of 12 sulfonamides, in the presence of putrescine as internal standard, after pre‐column derivatization with fluorescamine. The drugs were separated on a Chromolith Performance RP‐18 column (100×4.6 mm), using a gradient elution with a binary mobile phase of methanol/0.05 M acetate buffer (pH 3.4). Linearity of derivatization was obtained for concentrations from 3.0 to 300 μg/L in standard solutions. The whole procedure was evaluated and fully validated, according to the European Union Decision 2002/657/EC, for the determination of sulfonamides in turkey muscle and hen eggs following SPE. The LODs varied from 2 to 17 μg/kg in turkey and 2 to 15 μg/kg in egg samples. The average recoveries ranged between 96.9–108.6% in turkey muscle and 96.0–108.4% in egg samples, respectively.     

用反相高效液相色谱法分离和测定丁烯二酸的顺反异构体

建立了分离和测定丁烯二酸的２个异构体－顺丁烯二酸和反丁烯二酸的反相高效液相色谱法。以Ｓｈｉｍ－ｐａｃｋ ＣＬＣ－ＯＤＳ柱为分析柱,以甲醇－水（体积比５：２）,用磷酸调至ｐＨ３．０）为流动相,流速０．７ｍＬ／ｍｉｎ,检测波长为２２０ｎｍ,外标法定量。顺、反丁烯二酸的检出限分别为０．１０和０．０７５ｍｇ／Ｌ（Ｓ／Ｎ＝２）;相对标准偏差分别为０．４７％和０．５４％（ｎ＝３）。二者的线性范围均为１０～６０