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Estimating Aluminum Leaching into Meat Baked with Aluminum Foil Using Gravimetric and UV-Vis Spectrophotometric Method
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作者 Layla A. Al Juhaiman 《Food and Nutrition Sciences》 2015年第5期538-545,共8页
Baking meat by wrapping them in Aluminum (Al) foil is common in many countries. The excessive use of Al foil in baking and the disagreement about using Al foils were the motivation to do this study especially after th... Baking meat by wrapping them in Aluminum (Al) foil is common in many countries. The excessive use of Al foil in baking and the disagreement about using Al foils were the motivation to do this study especially after the 2007 WHO/FDA Report. In this investigation, a gravimetric and a UV-Vis spectrophotometric method are used to estimate Aluminum (Al) leaching into meat baked by wrapping in Al foil. Three kinds of meat were used fish, cow stakes and chicken. The importance of Al exposure area was neglected by many studies. Five factors affecting Al leaching into meat are studied (baking temperature, baking time, additives, Al exposure area and weight of meat). The effect of cooking times (20, 40, 60 minutes) at 180℃ and cooking temperatures (160℃, 180℃, 200℃) at 60 minutes on the amount of Al leaching were evaluated. It was found that Al leaching into meat increased with increasing temperature, baking time, additives and Al exposure area. Moreover, Al exposure area was more effective than the weight of the meat. The Al leaching was highest in fish and lowest in chicken. Comparing the present results with the Provisional Tolerance Weekly Intake of Al approved by WHO/FDA, it shows that Al leaching into meat baked by wrapping in Al foil may add considerable doses into the diet. Continuous monitoring of Al foil used for baking meat is recommended. 展开更多
关键词 AL FOIL AL LEACHING into MEAT Weight Loss uv-vis method Provisional Tolerable WEEKLY Intake
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Quality Control of Tramadol in Kisangani: Development, Validation, and Application of a UV-Vis Spectroscopic Method 被引量:4
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作者 Marguerite Borive Amani Jérémie Mbinze Kindenge +4 位作者 Emile Tweni Baruti Elodie Nsasi Bakiantima Salomon Batina Agasa Philippe Hubert Roland Marini Djang’eing’a 《American Journal of Analytical Chemistry》 2021年第8期295-309,共15页
<strong>Context:</strong> Substandard and falsified medicines are circulating in low-income countries mostly without any control. We availed a simple and not expensive UV-Vis spectroscopic method to evalua... <strong>Context:</strong> Substandard and falsified medicines are circulating in low-income countries mostly without any control. We availed a simple and not expensive UV-Vis spectroscopic method to evaluate the quality of tramadol in Kisangani before and during the Covid-19 period. <strong>Methods:</strong> For the analytical quantitative method, an experimental design was applied to set up the optimal levels of the selected factors, namely, pH of dissolution medium, type of cuvette, and wavelength. Taking into account the capsule pharmaceutical formulation within 80 - 120 μg&middotmL<sup>-1</sup> concentration range, we analyzed 89 tramadol samples from pharmacies and hospitals of the six Kisangani municipalities. <strong>Results:</strong> pH showed a significant effect on absorbance, whereas quartz cuvette and wavelength did not. A typical 100 μg&middotmL<sup>-1</sup> tramadol solution gave an absorbance of 0.64 at 272 nm. Validation highlighted a matrix effect observed with a 6% bias. A correction factor of 0.9372 allowed to improve the accuracy profile, which were then totally included within the 10% acceptance limits. Quality control revealed that 25 samples out of 89 were not compliant in terms of manufacturing license, registration status in DRC and content as well. <strong>Conclusion:</strong> This study showed that the strengthening of analytical strategy in Kisangani is a need. 展开更多
关键词 TRAMADOL uv-vis Spectroscopy method Development VALIDATION Quality Control
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Determination of Thioglucoside in Cabbage by Using the Ultraviolet-visible Light Spectrophotometer
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作者 WANGJing WANGQing 《Journal of Northeast Agricultural University(English Edition)》 CAS 2000年第2期149-157,共9页
The ultraviolet-visible light spectrophotometer method was adopted to determine thioglucoside in cabbage with the seeds.Individual plant of cabbage was used as test materials,palladium chloride as complexing agent and... The ultraviolet-visible light spectrophotometer method was adopted to determine thioglucoside in cabbage with the seeds.Individual plant of cabbage was used as test materials,palladium chloride as complexing agent and sodium cellulose glycolate as dispersing agent.The results showed that palladiumd thioglucoside method could be taken as a quick,easy and precise quantitative analysis method to determine thioglucoside in cabbage. 展开更多
关键词 Ultraviolet visible light spectrophotometer method CABBAGE thioglucoside determination method
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铜仁缬草不同部位药效成分的质量研究
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作者 张进芳 范琳琳 龚安慧 《广东化工》 CAS 2024年第2期127-129,共3页
建立铜仁宽叶缬草的质量标准研究。方法:在500 nm波长处采用紫外-可见分光光度法对铜仁宽叶缬草药材中总黄酮进行含量测定。结果标准曲线的回归方程为y=10.6736x+0.0024(r=0.999935,n=5)。结果表明,芦丁进样量在0.008~0.056 mg范围内与... 建立铜仁宽叶缬草的质量标准研究。方法:在500 nm波长处采用紫外-可见分光光度法对铜仁宽叶缬草药材中总黄酮进行含量测定。结果标准曲线的回归方程为y=10.6736x+0.0024(r=0.999935,n=5)。结果表明,芦丁进样量在0.008~0.056 mg范围内与吸光度呈良好的线性关系;精密度试验,结果,RSD=0.0011%(n=5),表明仪器精密度良好;稳定性试验,结果,RSD=0.0026%(n=6),表明供试品溶液在120 min内稳定性良好;重复性试验,结果,样品中芦丁的平均质量分数为0.71%,RSD=0.13%(n=6),表明本方法重复性良好;加样回收率试验,结果,RSD=1.66%(n=6)。结论:本方法能准确反映铜仁宽叶缬草不同部位中总黄酮的含量,作为参考只有在符合宽叶缬草叶子、茎部、根部样品中芦丁的平均质量分数分别在11.59%、0.98%、0.71%以上才符合铜仁宽叶缬草的质量要求;本实验在实现资源利用充分的同时,其总黄酮的质量要求范围为铜仁宽叶缬草的质量标准提供了一定的参考价值。 展开更多
关键词 宽叶缬草 质量标准 检测方法 紫外-可见分光光度法 黄酮类
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A Pioneering Approach to the Synthesis of Silver Nanoparticles
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作者 Wasan A. Al-Dulaimi Zeena M. Al-Azzawi Emad K. Al-Shakarchi 《Journal of Materials Science and Chemical Engineering》 2024年第7期14-22,共9页
Our research introduces a groundbreaking chemical reduction method for synthesizing silver nanoparticles, marking a significant advancement in the field. The nanoparticles were meticulously characterized using various... Our research introduces a groundbreaking chemical reduction method for synthesizing silver nanoparticles, marking a significant advancement in the field. The nanoparticles were meticulously characterized using various techniques, including optical analysis, structural analysis, transmission electron microscopy (TEM), and field-emission scanning electron microscope (FESEM). This thorough process instills confidence in the accuracy of our findings. The results unveiled that the silver nanoparticles had a diameter of less than 20 nm, a finding of great importance. The absorption spectrum decreased in the peak wavelength range (405 - 394 mm) with increasing concentrations of Ag nanoparticles in the range (1 - 5%). The XRD results indicated a cubic crystal structure for silver nanoparticles with the lattice constant (a = 4.0855 Å), and Miller indices were (111), (002), (002), and (113). The simulation on the XRD pattern showed a face center cubic phase with space group Fm-3m, providing valuable insights into the structure of the nanoparticles. 展开更多
关键词 Chemical Reduction method uv-vis Absorption Spectrometer Field-Emission Scanning Electron Microscope (FESEM) Transmission Electron Microscopy (TEM)
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原子吸收分光光度法测定水中钙和镁的方法验证
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作者 徐婷 《山西水利科技》 2024年第1期36-39,共4页
实验室对《水质钙和镁的测定原子吸收分光光度法》(GB 11905-1989)开展方法验证,通过标准曲线、最低检出浓度、精密度、准确度和加标回收率五个方面进行了详细阐述。结果表明,测定结果中各项特性指标均符合标准要求,实验室已具备使用原... 实验室对《水质钙和镁的测定原子吸收分光光度法》(GB 11905-1989)开展方法验证,通过标准曲线、最低检出浓度、精密度、准确度和加标回收率五个方面进行了详细阐述。结果表明,测定结果中各项特性指标均符合标准要求,实验室已具备使用原子吸收分光光度计检测水中钙和镁项目的能力。 展开更多
关键词 原子吸收分光光度法 钙和镁 方法验证 原子吸收分光光度计
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Effect of drying methods on the discoloration of three major domestic softwood species in Korea 被引量:2
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作者 Ho-yang Kang 《Forestry Studies in China》 CAS 2006年第3期48-50,共3页
Japanese pine, Korean pine and larch are three major softwood species in Korea. Their colors are relatively light, thus easily discolored due to drying and UV irradiation. In this study, they were dried with five diff... Japanese pine, Korean pine and larch are three major softwood species in Korea. Their colors are relatively light, thus easily discolored due to drying and UV irradiation. In this study, they were dried with five different drying methods, steam treated and exposed to weathering. Their colors were measured using a spectrophotometer and comparisons made both among species and drying methods. For Japanese and Korean pines, high temperature dried and steam-dried specimens showed distinct color differences compared with the controls. Steam treatment discolored the dried specimens of Japanese and Korean pines but did not discolor those of larch. After weathering for 144 days the specimens of Japanese pine showed slight color differences among drying methods. 展开更多
关键词 DISCOLORATION drying method steam treatment WEATHERING spectrophotometer
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PHOTODEGRADATION OF p-NITROCHLORBENZENE(p-NCB)USING NANOMETER-SIZED ZnO PARTICLES PREPARED BY REACTIVE EVAPORATION METHOD 被引量:1
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作者 A.A.A.Saleh X.J.Zhai +2 位作者 Y.C.Zhai Y.Fu M.M.Elomella School of Materials and Metallurgy,Northeastern University,Shenyang 11O006,China 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2004年第2期181-188,共8页
Photocatalytic degradations of p-nitrochlorbenzene (p-NCB) with distilled water wereinvestigated with ZnO crystals (catalyst) of 70nm in diameter under UV irradiation.The suitable experimental conditions are determine... Photocatalytic degradations of p-nitrochlorbenzene (p-NCB) with distilled water wereinvestigated with ZnO crystals (catalyst) of 70nm in diameter under UV irradiation.The suitable experimental conditions are determined as: ZnO 0.25g, pH 7, p-NCBconcentration 30mg/L. These variables in terms of the degradation rate have beendiscussed, which was defined as the rate of the initial degradation to the final degrada-tion of p-NCB. When all of the experimental degradation rate values are plotted as afunction of irradiation time, all of the points appeared on a single line for wide range ofp-NCB degradations. On the basis of these results, it has been concluded that at lowerZnO catalyst amount, much of the light is transmitted through the slurry in the con-tainer beaker, while at higher catalyst amount, all the incident photons are observedby the slurry. Degradation rates of p-NCB were found to decrease with increasingsolution pH. It has been concluded that the maximum degradation rate values of p-NCB under principally the same experimental conditions mentioned above are 97.4%,98.8% and 95.5% at 100min respectively. The results suggest that the photocatalyticdegradation is initiated by an oxidation of the p-NCB through ZnO surface-adsorbedhydroxyl radicals. Absorption spectra are recorded using spectrophotometer before andafter UV-irradiation in the wavelength range 200-400nm at room temperature. Itis found that the variation of irradiation time over the range 20-100min resulted inchange in the form of the spectrum linear absorption and a higher maximum valuewill be obtained at longer irradiation time. 展开更多
关键词 reactive evaporation method nano-ZnO particles pnitrochlorbenzene (p-NCB ultraviolet light spectrophotometer CATALYST
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The Preparation of Nano Silver by Chemical Reduction Method 被引量:1
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作者 Tevfik Raci Sertbakan Emad K. Al-Shakarchi Saif Sultan Mala 《Journal of Modern Physics》 2022年第1期81-88,共8页
A silver nanostructures prepared by using chemical reduction method. The silver nanoparticles were prepared with diameters of about (20 nm). Numerous techniques had been used to study the optical, structural like the ... A silver nanostructures prepared by using chemical reduction method. The silver nanoparticles were prepared with diameters of about (20 nm). Numerous techniques had been used to study the optical, structural like the UV-Vis absorption spectrometer, Ttransmission Electron Microscopy (TEM), Field-Emission Scanning Electron microscope (FESEM), and X-ray diffraction (XRD). The practical results exhibited the absorption spectrum of the prepared nanoparticles at (357 nm), it was found that there is a relationship between the positions of the optical absorption peak and the size of the silver nanoparticles. The analysis of TEM results showed the presence of nanoparticles in the range (20 nm). The analyzing of XRD results explained the crystal structure for silver nanoparticles. It is found a cubic unit cell have a lattice constants (a = 4.0855 <span style="white-space:nowrap;">&Aring;</span>), with the Miller indices were (111), (002), (002), and (113). 展开更多
关键词 Chemical Reduction method uv-vis Absorption Spectrometer Field-Emission Scanning Electron Microscope Ttransmission Electron Microscopy
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分光光度法测定化妆品中二氧化钛的不确定度评定
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作者 马泽鑫 关漪莲 +1 位作者 张弦 漆爱明 《广东化工》 CAS 2023年第18期181-184,共4页
目的:为更好服务化妆品安全监管,推动化妆品产业高质量发展,提升质量控制水平,优化科学监管模式,本次考察《化妆品安全技术规范》(2015年版)理化检验方法5.3二氧化钛的检验可靠性和准确性。方法:根据《化妆品安全技术规范》(2015年版)... 目的:为更好服务化妆品安全监管,推动化妆品产业高质量发展,提升质量控制水平,优化科学监管模式,本次考察《化妆品安全技术规范》(2015年版)理化检验方法5.3二氧化钛的检验可靠性和准确性。方法:根据《化妆品安全技术规范》(2015年版)理化检验方法5.3二氧化钛,本文采用分光光度法测定化妆品中二氧化钛含量并对测量不确定度进行分析评定,建立分析测定防晒美白类化妆品中二氧化钛的不确定度数学模型,分析了影响不确定度的主要来源,并对各不确定度分量进行评定和合成,计算扩展不确定度。结果:钛含量为2.43%,在95%置信区间,扩展不确定度0.052%(k=2)。结论:通过系统分析,确定影响不确定度主要来源有:样品重复性、标准物质和加标回收,方法合理,结果精确,可运用到实际工作中,为系统评价检测结果的准确程度和方法的可靠性提供依据。 展开更多
关键词 二氧化钛 不确定度 安全监管 化妆品 分光光度法
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原子吸收分光光度计石墨炉法测定小米中铬的不确定度分析 被引量:2
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作者 贾欣 《食品工程》 2023年第3期44-47,共4页
建立原子吸收分光光度计石墨炉法测定小米中铬的不确定度分析方法。依据标准JJF 1059.1—012和GB/T 27411—2012,评定GB 5009.123—2014 《食品安全国家标准食品中铬的测定》中原子吸收分光光度计石墨炉法测定小米中铬含量的不确定度,... 建立原子吸收分光光度计石墨炉法测定小米中铬的不确定度分析方法。依据标准JJF 1059.1—012和GB/T 27411—2012,评定GB 5009.123—2014 《食品安全国家标准食品中铬的测定》中原子吸收分光光度计石墨炉法测定小米中铬含量的不确定度,建立数学模型,识别检测过程中影响结果的不确定度分量来源并分析评定,得到原子吸收分光光度计石墨炉法测定小米中铬的不确定度。结果表明,当小米中铬元素含量为0.063 mg/kg时,其扩展不确定度为0.002 3 mg/kg (k=2,置信区间95%)。 展开更多
关键词 原子吸收分光光度计石墨炉法 不确定度分析
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不透光烟度计滤光片的测试方法
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作者 许建军 李博 贾会 《测试技术学报》 2023年第4期289-294,共6页
不透光烟度计滤光片是校准不透光烟度计的计量标准器具,其量值溯源问题日益受到关注。试验使用分光光度计对不透光烟度计滤光片的透射比进行测量,通过人眼明视觉函数加权计算后赋值,根据不透光烟度计滤光片制作工艺和物理特性,从透射比... 不透光烟度计滤光片是校准不透光烟度计的计量标准器具,其量值溯源问题日益受到关注。试验使用分光光度计对不透光烟度计滤光片的透射比进行测量,通过人眼明视觉函数加权计算后赋值,根据不透光烟度计滤光片制作工艺和物理特性,从透射比的均匀性、正反向差值以及稳定性等方面来考察其性能。通过对试验数据的分析,表明透射比均匀性、透射比正反向差值不大于0.3%,透射比年变化量不大于0.5%,使用增量反应调整法考察不透光烟度计滤光片稳定性时,建议测试间隔为1年。试验建立的测试项目、测试方法及提出的技术参数为第三方检测机构开展此类设备的测试提供了参考。 展开更多
关键词 不透光烟度计滤光片 不透光烟度计 测试方法 分光光度计 人眼明视觉函数 透射比
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大曲氨态氮测定的检测方法应用研究与分析
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作者 张艳 刘楚楚 梅春水 《酿酒》 CAS 2023年第2期97-99,共3页
提供了一种大曲中氨态氮的检测方法,利用分光光度法对浓香型大曲中氨态氮(NH4+-N)含量进行分析,通过计算机线性拟合作出标准工作曲线。该方法检测大曲中氨态氮含量的相对标准偏差1.25%,回收率为95.8%,可用于日常浓香型大曲中氨态氮的检... 提供了一种大曲中氨态氮的检测方法,利用分光光度法对浓香型大曲中氨态氮(NH4+-N)含量进行分析,通过计算机线性拟合作出标准工作曲线。该方法检测大曲中氨态氮含量的相对标准偏差1.25%,回收率为95.8%,可用于日常浓香型大曲中氨态氮的检测分析,为科学酿酒提供数据支撑。 展开更多
关键词 浓香型大曲 氨态氮 分光光度计法
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药用辅料海藻酸钠含量测定的方法研究
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作者 孔璇 张玉婷 +1 位作者 吴燕 刘菁 《中国药品标准》 CAS 2023年第1期86-89,共4页
目的:建立容量法和分光光度法测定药用辅料海藻酸钠的含量。方法:将海藻酸钠与浓盐酸发生脱羧反应生成二氧化碳,经过量的氢氧化钠吸收,然后用盐酸滴定剩余的氢氧化钠,从而推算样品中海藻酸钠的含量;分光光度法将海藻酸钠与四硼酸钠-硫... 目的:建立容量法和分光光度法测定药用辅料海藻酸钠的含量。方法:将海藻酸钠与浓盐酸发生脱羧反应生成二氧化碳,经过量的氢氧化钠吸收,然后用盐酸滴定剩余的氢氧化钠,从而推算样品中海藻酸钠的含量;分光光度法将海藻酸钠与四硼酸钠-硫酸作用后,可与间羟基联苯反应形成紫红色化合物,通过吸光度与海藻酸钠质量的线性关系,计算得海藻酸钠的含量。结果:对容量法前处理条件进行探索优化后,平均加标回收率为96.4%,RSD为1.9%(n=6);分光光度法平均回收率为101.9%,RAD为0.45%(n=2),两方法的样品含量测定结果一致。结论:两种方法准确度高、精密度、耐用性好,均可用于药用辅料海藻酸钠的含量测定。 展开更多
关键词 药用辅料 海藻酸钠 容量法 分光光度法 含量测定
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工业合成盐酸中铁含量分析方法研究
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作者 糜贵廷 《氯碱工业》 CAS 2023年第9期37-41,45,共6页
对电感耦合等离子体发射光谱法和分光光度法测定工业用合成盐酸中铁含量的方法进行研究。确定了试验条件及试验方法,并对两种方法进行了对比,得出每种方法的适用范围。通过试验,认为电感耦合等离子体法更适合目前国内工业合成用盐酸铁... 对电感耦合等离子体发射光谱法和分光光度法测定工业用合成盐酸中铁含量的方法进行研究。确定了试验条件及试验方法,并对两种方法进行了对比,得出每种方法的适用范围。通过试验,认为电感耦合等离子体法更适合目前国内工业合成用盐酸铁含量的测定,并且准确度更高。 展开更多
关键词 盐酸 铁含量 分析方法 电感耦合等离子体法 分光光度法
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原子吸收分光光度计火焰吸收法测定矿样中锌的含量
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作者 罗凌云 《世界有色金属》 2023年第15期142-144,共3页
在地质工作中,对矿样元素含量检测是非常重要的工作。其中,针对矿样锌元素检测也是极为重要的工作环节。当前,能够对矿样锌元素测量的方式有很多,通过使用原子吸收分光光度计火焰吸收法测定结果精确性高,整个操作过程非常简单,但是在具... 在地质工作中,对矿样元素含量检测是非常重要的工作。其中,针对矿样锌元素检测也是极为重要的工作环节。当前,能够对矿样锌元素测量的方式有很多,通过使用原子吸收分光光度计火焰吸收法测定结果精确性高,整个操作过程非常简单,但是在具体使用过程中也会产生测定结果不准确的情况。基于这种情况下,应当对原子吸收分光光度计火焰吸收法测定锌元素含量的不稳定因素进行研究分析,将锌液体浓度按照梯度进行设置,在确保反应程度保持相关的基础上,从而避免锌自吸情况。通过对标准曲线进行观察,为确保检测矿样原子吸收分光光度计火焰吸收法的吸光度在测定区间范围内,需要结合待检测溶液浓度的实际情况,将已经稀释的待检测矿样溶液倍数进行提升,操作过程需要关注仪器使用情况,及时对标准溶液进行更换,有效提升测定效果。经过实验分析后,测定结果和矿样品位和实际测定矿样保持一致,金属成分保持稳定,有效解决了测定过程产生波动的问题,以此提升了测定结果的精确性。 展开更多
关键词 原子吸收分光光度计 火焰吸收法 矿石分析 锌元素测定
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水果中的总酚测定
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作者 朱艳红 《现代食品》 2023年第24期194-196,共3页
水果中的总酚是由芳香环和2个以上酚羟基组成的单体分子到高聚合化合物的一类次生代谢产物的统称。本研究采用福林酚-比色法,提取了水果及其制品中的总酚。结果表明,此方法简便、快捷,且灵敏度高,可用于检测水果中的总酚含量。
关键词 水果 总酚 紫外分光光度计法
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层析柱洗脱条件对保健品中总皂苷含量测定的影响
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作者 杜晶 陈昭 +4 位作者 杨子忠 李亚军 吴媛媛 甘琴 冯雪萍 《农产品加工》 2023年第19期65-67,72,共4页
为建立紫外分光光度法测定保健食品苦瓜硒铬酵母胶囊中总皂苷含量的方法。以Amberlite-XAD-2型大孔树脂和中性氧化铝作为层析柱,采用水-乙醇溶剂系统对样品的皂苷成分进行提取、纯化、富集和洗脱,人参皂苷Re作为对照品,以高氯酸显色后... 为建立紫外分光光度法测定保健食品苦瓜硒铬酵母胶囊中总皂苷含量的方法。以Amberlite-XAD-2型大孔树脂和中性氧化铝作为层析柱,采用水-乙醇溶剂系统对样品的皂苷成分进行提取、纯化、富集和洗脱,人参皂苷Re作为对照品,以高氯酸显色后利用紫外分光光度法于波长560 nm处测定其总皂苷含量,并进行方法学考查。通过对前处理进行优化,以70%乙醇提取、吸附30 min并采用20 m L水进行洗脱,总皂苷提取含量为1.596%,可达最高。通过线性、回收率和精密度进行方法学考查,人参皂苷Re在0~0.167 mg/m L的质量浓度范围内呈良好线性关系,相关系数R~2为0.999 5;总皂苷加标回收率为100.8%~104.6%,平均回收率为102.6%,RSD为1.5%;精密度试验平均含量为1.09%,RSD为2.8%,表明保健品总皂苷的提取方法优化使得提取率高且稳定可行。此方法操作简单,准确性好、重复性好,适用于保健食品中总皂苷的含量测定。 展开更多
关键词 人参皂苷RE 紫外分光光度计法 保健食品 检测
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辣椒叶片花青素含量的遗传分析 被引量:14
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作者 隋益虎 陈劲枫 +2 位作者 杨学玲 李晶晶 史建磊 《南京农业大学学报》 CAS CSCD 北大核心 2009年第3期19-24,共6页
选用3个紫色辣椒和2个绿色辣椒品种配制杂交组合,并构建3个杂交组合的6世代群体(P1、P2、F1、B1、B2和F2),用分光光度法测定辣椒叶片花青素相对含量,研究其遗传规律。结果表明:3个杂交组合的分离群体叶片花青素含量呈现出多峰或... 选用3个紫色辣椒和2个绿色辣椒品种配制杂交组合,并构建3个杂交组合的6世代群体(P1、P2、F1、B1、B2和F2),用分光光度法测定辣椒叶片花青素相对含量,研究其遗传规律。结果表明:3个杂交组合的分离群体叶片花青素含量呈现出多峰或单峰偏态分布,表现为主基因+多基因的数量遗传特征;通过多世代联合分析表明,辣椒叶片花青素含量遗传模式符合2对加性-显性-上位性主基因+加性-显性-上位性多基因模型(E-0模型);F2群体主基因遗传率较高,为78.89%~91.47%,多基因遗传率较低,为5.19%-17.00%。建议:对辣椒紫叶性状的遗传选择可在分离早期世代进行。 展开更多
关键词 辣椒 花青素 紫叶 分光光度法 遗传
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不同前处理方法对测定植物性饲料微量元素铜、铁含量的影响 被引量:20
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作者 郑树贵 郭东新 +2 位作者 曹松屹 牛巨龙 董伟国 《中国饲料》 北大核心 2006年第15期37-40,共4页
本试验采取有代表性的饲料原料,分别采用干灰化法、湿消化法和酸溶解法3种不同的处理方法处理饲料样本测定微量元素铜(Cu)、铁(Fe)含量。试验以精确度、准确度、所需时间、操作的难易程度等为指标综合比较不同处理方法对饲料分析的实际... 本试验采取有代表性的饲料原料,分别采用干灰化法、湿消化法和酸溶解法3种不同的处理方法处理饲料样本测定微量元素铜(Cu)、铁(Fe)含量。试验以精确度、准确度、所需时间、操作的难易程度等为指标综合比较不同处理方法对饲料分析的实际意义。实验表明:国标干灰化法需专门设备,灰化时间较长;湿法消化法和酸溶解法可以达到国标法的精确度和准确度,在进行植物性饲料微量元素Cu、Fe的测定时,可以用湿消化法和盐酸溶解法代替国标法。 展开更多
关键词 原子吸收分光光度法 测定方法 饲料
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