微量进样火焰原子吸收光谱法测定血浆,红细胞中铜,铁和锌

本文叙述了在国产ＷＹＸ－４０２型原子吸收分光光度计上采用微量增样技术，用火焰原子吸收光谱法测定血浆，红细胞中铜，铁和锌的含量，获得了与常规法相同的灵敏度。血浆中铜，铁和锌的平均回收率分别为１０１．０％，１０３．０％，１００．８％。相对标准偏差分别为１．２５％，１．４４％，３．１４％。红细胞中铜，铁和锌的平均回收率分别为１０２．５％，１０４．９％，９７．９％，相对标准偏差分别为３．４％．１４８％．３     

火焰原子吸收法测定中国梨木虱分泌物中的Na、Mg、Ca、Zn、Cu

本文叙述了用火焰原子吸收分光光度法直接测定中国梨木虱分泌物中的钠，钙，镁，锌和铜，方法简便，可靠，具有良好的精密度和准确度，相对标准偏差为１．３％￣３．４％，回收率为８９．６％￣１０４％。     

火焰原子吸收光谱法测定医药原料黄体酮中的铬

本文研究了黄体酮中微量元素铬的火焰原子吸收分光光度法的测定，方法简便、快速，省时，具有良好的精密度和准确度。平均相对标准偏差为３．０２％，平均回收率为９８．８％。     

火焰原子吸收测定泥炭中三种形态钾的方法研究

本文研究了原子吸收法测定泥炭中全量钾、缓效钾和速效钾的溶解，提取方法和测定条件，获得满意结果，钾的平均回收率为９７％－１０２％，相对标准偏差小于３％。     

火焰原子吸收光谱测定头发中的锌、铁、钙、镁

本文研究了头发中锌、铁、钙、镁微量金属元素的火焰原子吸收分光光度法的测定。方法简便，省时，具有良好的精密度和准确度。相对标准偏差分别为锌２．９％、铁１．９％、钙１．３％、镁３．４％。     

火焰原子吸收光谱测定头发中的锌,铁,钙,镁

本文研究了头发中锌，铁，钙，镁微量金属元素的火争原子吸收分光光度法的测定，方法简便，省时，具有良好的精密度和准确度，相对标准偏差分别为锌２．９％，铁１．９％，钙１．３％，镁３．４％。     

火焰原子吸收光谱测定XF—120膦羧酸缓蚀阻垢剂中的钴

本文研究了ＸＦ－２１０膦羧酸缓蚀阻垢剂中微量金属元素的火焰原子吸收光分光光度法的测定，方法简便，省时，具有良好的精密度和准确度，平均相对标准偏差为１．４２％，平均回收率为９５．７％。     

火焰原子吸收法测定高铝锌基合金中的铜

提出了用火焰原子吸收光谱法测定高铝锌基合金中铜含量的方法,在本法测定条件下,基体元素及其他共存元素不干扰,可测定质量分数为２．０％－３．０％范围内的高铝锌基合金中的铜。该方法相对标准偏差为０．８６７％,样品加标回收率为９８．４％。     

火焰原子吸收光谱法测定盐酸脱氧土霉素中的铁

本文研究了盐酸脱氧土霉素中微量金属元素的铁的火焰原子吸收分光光度法的测定。方法简便、省时、具有良好的精密度和准确度。其相对标准偏差为０．５４％，平均回收率为９９．２％。     

微波消解-原子吸收分光光度法测定魔芋粉中铜、铁、锰、锌的含量

将硝酸和过氧化氢放入聚四氟乙烯密闭罐中，置于家用微波炉内，微波消化魔芋粉，火焰原子吸收分光光度法测定铜、铁、锰、锌的含量。回收率为95．2％－106．4％，相对标准偏差为1．0％－3．9％。方法快速、简便，具有良好的精密度和准确度。     

用于血糖无创检测的喇曼光谱系统

以铊掺杂自聚焦透镜作为光谱采集透镜,设计了一种小型可穿戴式光谱采集探头,在此基础上搭建了一种小型可穿戴式血糖喇曼光谱检测系统.利用该系统对不同浓度的葡萄糖溶液、11只实验白鼠以及10位人体志愿者进行测试.以光谱特征峰面积作为主要计算参考,以峰强度作为辅助参考进行光谱定量分析.针对不同样本分别建立基于主导因子的非线性多变量偏最小二乘模型以计算葡萄糖水平.计算结果表明葡萄糖溶液、实验白鼠以及人体的准确度分别为98.1%、89.3%和84.4%,测试准确性得到提高.该检测系统具有体积小、成本低、喇曼信号采集稳定、使用方便等优点,能够准确实现人体血糖的无创检测并具有较好的可重复性.     

荧光光谱法测定血中的三氟拉嗪

利用固相萃取技术分离血中三氟拉嗪 ,荧光法进行了测定。方法的线性范围为 0 .1— 30μg/m L ,回收率为 75 %— 86 % ,相对标准偏差为 2 .7%— 5 .2 % ,检出限为 0 .1μg/m L。     

Numerical study of magnetic nanoparticles concentration in biofluid (blood) under influence of high gradient magnetic field

Ferrofluids are widely used in pharmaceutical industries as magnetic separation tools, anti-cancer drug carriers and micro-valve applications. The purpose of the current study is to investigate the effect of a magnetic field on the volume concentration of magnetic nanoparticles of a non-Newtonian biofluid (blood) as a drug carrier. The effect of particles on the flow field is considered. The governing non-linear differential equations, concentration and Naviar-stokes are coupled with the magnetic field. To solve these equations, a finite volume based code is developed and utilized. The results show accumulation of magnetic nanoparticles near the magnetic source until it looks like a solid object. The accumulation of nanoparticles is due to the magnetic force that overcomes the fluid drag force. As the magnetic strength and size of the magnetic particles increase, the accumulation of nanoparticles increases, as well. The magnetic susceptibility of particles also affects the flow field and the contour of the concentration considerably.     

基于近红外反射光谱的无损血糖分析

无损血糖监测是一种方便且无痛的血糖监测方法。目前,大部分的血糖检测方法都是有损的。提出了一种基于近红外反射光谱的无损血糖检测方法。近红外反射光谱是一种安全、简单并且有效的方法,被应用于很多领域。采用口服葡糖糖耐量试验来采集数据,用偏最小二乘回归方法来建模。使用市售血糖仪采指尖血作为参考值,同时用光谱仪提取手掌光谱,共取得42组样本。血糖浓度范围在5~12 mmol·L-1。采用留一法交叉验证,获得所有数据的交叉验证的均方根误差为1.16 mmol·L-1。通过归一化和无关变量消除的预处理方法来减少噪声并消除一些额外因素,优化的均方根误差为0.79 mmol·L-1。基于个人的数据进行建模,得到了远小于整体数据的结果：0.41 mmol·L-1。该方法在个人血糖检测的市场化方面有广阔的应用前景。     

石墨炉原子吸收光谱法测定人血清中微量锰

采用石墨炉原子吸收光谱法测定人血清中微量锰 ,回收率为 10 5 .0 % ,检出限为 7.7× 10 -10 g/ m L,相对标准偏差为 6 .5 16 %。本方法简单、快速和准确 ,已用于血中微量锰的测定 ,结果令人满意。     

Determining uterine blood flow in pregnancy with magnetic resonance imaging

Objective

The purpose of this study is to determine the feasibility of measuring total uterine blood flow in pregnancy using magnetic resonance imaging (MRI) technique.

Methods

Uterine blood flow was determined in pregnant women in whom MRI was being carried out to assess a fetal anomaly. A two-dimensional time-of-flight magnetic resonance (MR) angiogram sequence was performed. Scout images and a peripherally gated phase contrast MR sequence were planned to study simultaneous blood flow in the uterine and ovarian arteries.

Results

The MR pelvic angiogram sequence was completed in 13 women. The uterine arteries were visualized and their cross-sectional area determined. The complexity of the pelvic blood supply prevented the calculation of blood flow velocity and, thus, total uterine blood flow.

Conclusion

The measurement of total uterine blood flow during pregnancy was not possible using our MR technique. The ovarian vessels were not consistently visualized. Doppler ultrasonography remains the best modality by which to estimate total uterine blood flow in pregnancy.     

Study of extracting characteristic parameters from a blood vessel

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Analysis of high gradient magnetic field effects on distribution of nanoparticles injected into pulsatile blood stream

Magnetic nanoparticles are widely used in a wide range of applications including data storage materials, pharmaceutical industries as magnetic separation tools, anti-cancer drug carriers and micro valve applications. The purpose of the current study is to investigate the effect of a non-uniform magnetic field on bio-fluid (blood) with magnetic nanoparticles. The effect of particles as well as mass fraction on flow field and volume concentration is investigated. The governing non-linear differential equations, concentration and Navier-stokes are coupled with the magnetic field. To solve these equations, a finite volume based code is developed and utilized. A real pulsatile velocity is utilized as inlet boundary condition. This velocity is extracted from an actual experimental data. Three percent nanoparticles volume concentration, as drug carrier, is steadily injected in an unsteady, pulsatile and non-Newtonian flow. A power law model is considered for the blood viscosity. The results show that during the systole section of the heartbeat when the blood velocity increases, the magnetic nanoparticles near the magnetic source are washed away. This is due to the sudden increase of the hydrodynamic force, which overcomes the magnetic force. The probability of vein blockage increases when the blood velocity reduces during the diastole time. As nanoparticles velocity injection decreases (longer injection time) the wall shear stress (especially near the injection area) decreases and the retention time of the magnetic nanoparticles in the blood flow increases.     

石墨炉原子吸收法测定骨肿瘤患者血清中微量钴

本文建立了用石墨炉原子吸收光谱法测定血清中微量钴的方法，血清以（１＋１）ＨＮＯ_３沉淀分离除去蛋白ＴｒｉｔｏｎＸ－１００和ＮＨ_４ＶＯ_３为基体改进剂，直接测定、方法简便、快速。回收率９７．６０％－１０２．１１％。ＲＳＤ＜７．２１％。     

肿瘤患者血清中钴元素含量测定方法研究

本文建立了一种用石墨炉原子吸收光谱法测定肿瘤患者血清中微量钴的方法，血清以（１＋）硝酸沉淀消除蛋白后，加Ｔｒｉｔｏｎ Ｘ－１００和偏钒酸铵基体改进剂直接测定。