[Determination of 14 aniline and benzidine compounds in soil by gas chromatography-mass spectrometry]. [PDF]
Se Pu, 2023 针对土壤基质复杂及部分苯胺类化合物提取效率低的特点,基于气相色谱-质谱建立了土壤中14种苯胺类和联苯胺类化合物的分析方法。在采集后的土壤样品中加入5%亚硫酸钠水溶液进行密封,以防止目标物氧化变质,并于4 ℃以下冷藏保存,保存期限可达7天。实验比较了加速溶剂提取和振荡分散提取两种方式的提取效率,最终采用提取时加入碱性水溶液和乙酸乙酯-二氯甲烷(1∶4, v/v)的方法,在土壤-水相-有机相共存的条件下进行振荡分散萃取。萃取完成后经离心弃去土壤固相,将水相和有机相转移至分液漏斗中,并分离出有机相 ...
Wu L +5 more
europepmc +2 more sources
[Determination of organophosphate diesters in facility vegetable soils using ultra-high performance liquid chromatography-electrostatic field orbitrap high resolution mass spectrometry]. [PDF]
Se Pu, 2023 有机磷酸二酯(Di-OPEs)被认为是有机磷酸三酯的生物或非生物降解产物。该研究基于超高效液相色谱-静电场轨道离子阱高分辨质谱(UHPLC-Orbitrap HRMS)建立了设施菜地土壤中磷酸二(2-氯)乙酯(BCEP)、磷酸二(1,3-二氯异丙基)酯(BDCP)、磷酸二正丁酯(DnBP)、磷酸二苯酯(DPhP)和磷酸二(2-乙基己基)酯(DEHP)5种Di-OPEs的定性定量分析方法。首先,土壤样品以甲醇为提取溶剂,超声提取,选择Oasis WAX固相萃取柱进行净化,用8 mL含5% (v/v ...
Liu M +7 more
europepmc +2 more sources
[Determination of 15 carbonyl compounds in soil using improved solid phase extraction-high performance liquid chromatography]. [PDF]
Se Pu, 2023 建立了改进的固相萃取-高效液相色谱法测定土壤中甲醛、乙醛、丙烯醛、丙酮、丙醛、丁烯醛、丁醛、苯甲醛、异戊醛、正戊醛、邻-甲基苯甲醛、间-甲基苯甲醛、对-甲基苯甲醛、正己醛和2,5-二甲基苯甲醛等15种醛酮类化合物的分析方法。利用乙腈对土壤进行超声提取,样品提取液与2,4-二硝基苯肼(2,4-DNPH)进行衍生化反应,生成稳定的腙类化合物;随后利用装有亲水亲脂平衡的N-乙烯基吡咯烷酮/二乙烯基苯共聚物填料的固相萃取小柱(Welchrom® BRP)对衍生后的溶液进行净化;采用Ultimate® XB ...
Xue KP +7 more
europepmc +2 more sources
[Determination of polychlorinated naphthalenes in soil using accelerated solvent extraction-molecular sieves solid-phase extraction coupled with gas chromatography-tandem mass spectrometry]. [PDF]
Se Pu, 2022 新污染物引发的环境和健康风险正逐步受到社会各界的广泛关注,我国第十四个五年规划和2035年远景目标纲要明确“重视新污染物治理”。作为新型的持久性有机污染物,多氯萘(PCNs)在土壤中通常处于痕量水平,一般需要经过多层硅胶柱/氧化铝柱等复杂的净化方法,再结合有效的分析手段才能实现准确测定。关注土壤中多氯萘分离分析方法可以为掌握和监管其在土壤中的污染状况提供技术和方法支持。研究以13X分子筛作为固相萃取吸附剂,评价了其对多氯萘的净化效果。研究发现:使用正己烷作为上样溶剂和淋洗剂,10 mL二氯甲烷/正己烷 ...
Jin J +6 more
europepmc +2 more sources
A Study on Pore Structure and Erosion Resistance of Soil Column Based on CT Scanning Technology [PDF]
, 2023 [Objective] The relationship between soil column pore structure and soil erosion resistance for soil columns with Bahiagrass was analyzed in order to provide a scientific basis for the optimal arrangement of plants for soil and water conservation and to ...
Cao Longxi +4 more
core +1 more source
工程建设, 2021 文章将详细介绍土壤内重金属镍的来源，通过专业的研究与调查，找出适宜的重金属镍的分析方法，如原子吸收法、发射光谱法、等离子质谱法及石墨消解分析法等，从而增强土壤内部重金属镍的分析水平。
红丽 李
semanticscholar +1 more source
Mechanical Properties of Medicago Sativa and Euphorbia Hypericifolia Root-Soil Complex [PDF]
, 2023 [Objective] The effects of soil moisture content and root area ratio on the soil consolidation effect of Medicago sativa and Euphorbia hypericifolia root systems and the interaction mechanism of root-soil were studied in order to provide scientific basis
Hai Long, Tan Shilin, Xu Bo
core +1 more source
Characteristics of Growth and Metabolism of Thermoascus aurantiacus QH-1 Derived Hongxinqu [PDF]
, 2023 To explore the growth metabolic characteristics of Thermoascus aurantiacus, the optimal growth conditions, ethanol tolerance, growth curve, saccharifying power and liquefaction power of Thermoascus aurantiacus QH-1 were analyzed.
Huanhuan LAI +4 more
core +1 more source
Water-holding Capacity of Reclaimed Grassland with Different Ages in Karst Regions [PDF]
, 2023 [Objective] The water-holding capacity of reclaimed grassland of different ages was studied in order to provide a scientific basis for water retention and soil and water conservation of reclaimed grassland in karst regions.
Li Xuemei +3 more
core +1 more source
Shuitu Baochi Xuebao, 2023 为探明生物结皮存在时,冻融条件下结皮盖度、坡度和流量对土壤分离能力的影响,以黄土高原北部东柳沟小流域的藻结皮为研究对象,采用室内模拟冻融和放水冲刷相结合的试验方法,利用正交设计和田口方法分析藻结皮盖度、坡度、流量和冻融对土壤分离能力的影响。结果表明:土壤分离能力最大时盖度、坡度和流量分别为10%、20 °和24 L/min,而冻融次数正交设计和田口方法中分别为10,1次。冻融条件下,随藻结皮盖度的增大土壤分离能力逐渐减小;随坡度和流量的增加土壤分离能力增大 ...
朱丽琴 +4 more
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