光度测定

The newly publish ed ISO Standard for determining the speed of medical X-ray films specifies the u se of X-ray beam for the exposure of the films during their sensitometric tests; though this method is precise,it requires the use of sophisticated equipment an d time consuming operations.

新颁布的测定医用X线胶片感光度的国际标准规定，用X-射线作为感光测定曝光时的光源，此法精确，但所需设备复杂，操作耗时。

The recent development of the analysis of trace arsenic is reviewed,including spectrophotography,atomic-absorption spectrometry,atomic-fluorescence spectrometry and electro-chemical determination.

综述了近年来痕量砷的测定方法，主要包括分光光度法、原子吸收光谱法、原子荧光法、电化学方法、X-射线荧光法、电感耦合等离子体质谱法等，并展望了联用技术在砷形态的分离和测定的应用前景

The Pt and Pd coexisting disturb is elimilated by double-wave spectrophotography, adopting dithizone as the extraction agent.

双波长分光光度法测定铂和钯使用双硫腙萃取双波长系数倍率法来测定结果，消除了铂钯共存的干扰。

We also introduced spectrophotometer into the analysis of sulfamate type electrolete to measure the content of nickel sulfamate for the first time. This method is much easier than the conventional chemistry titration, it can be accomplished within one minute. Furthermore, it enhances significantly the precision of the measurement.

在电铸液分析中，我们首次将分光光度法应用于氨基磺酸盐型镍电铸液中氨基磺酸镍的测定，该方法较传统的化学滴定法操作更简单，它可以在1分钟内完成氨基磺酸镍浓度的测定，且大幅提高了分析结果的精确度，样品的消耗量仅为原来的千分之一。

To extract and determine the volume of polysaccharides from swertia mussotii franch ,the optimal condition is determined by the orthayonal experiment,and volume of polysaccharides is measured by spectrophotometry.

对川西獐牙菜中多糖进行提取及含量测定；通过正交实验确定提取多糖的优化条件，用分光光度法测定多糖的含量；川西獐牙菜多糖提取的最佳条件是：料液比为1：10、提取时间为2.0h、提取次数为4次、温度90℃。

A Spectrophotometric method for the determination of Flavone in the extract of Toona sinensis leaves was established.

建立了AlCl3显色分光光度法测定香椿叶提取液中总黄酮的测定方法。

Stems and leaves were determined and compared by al(no3)3 colorimetry and hplc. the method with ultrasonic wave was applied to extract flavonoids from the leaves and stems of urtica dioical l.. with the contents of flavonoids as the index, the best extraction conditions were selected out. results the best extraction conditions were as follows:soaking the raw material with ethanol(80%, v/v)-water solution (1∶30) at 60℃.

方法分别采用al（no3）3络合分光光度法和hplc法测定异株荨麻茎叶中黄酮类化合物的含量，并对测定结果进行比较；同时以黄酮类化合物的含量为指标，优选出了超声波辅助法提取异株荨麻茎叶中黄酮类化合物的最佳条件。

A fully automated simultaneous determination of nitrate and nitrite in water samples by sequential injection analysis based on the Griess diazo-coupling reaction and the formed azo dye for nitrite at 540nm and reduction to nitrite using coppered cadmium column.

用顺序注射分光光度法，通过一次进样。同时测定硝酸根和亚硝酸根。亚硝酸根是根据格里斯重氮－偶联反应，形成偶氮染料后在波长540nm下进行检测。而硝酸根则通过镀铜镉粒还原柱还原为亚硝酸根后进行测定。

Methods 32 rats were euthanized and femurs were removed by disarticulated. The left femurs were heated for 3 minutes, 5 minutes, 10 minutes and 15 minutes with the microwave and the histochemical assay for special lactate dehydrogenase activity was evaluated. The rat bone's biomechanics and the content of calcium tests were carried out.

应用 微波对实验组股骨分别加热3、5、10、15min后，用特殊的乳酸脱氢酶活性染色，判断骨、软骨细胞的活力；用Instron万能材料试验机测定股骨的生物力学并同步记录；用原子吸收分光光度仪测定股骨钙的含量。

Those methods can be used to determine the content of naringin, pectin and biofavonoids in the peel or the extraction in those ranges of linear line.(2) The process of extraction, discoloring, separation of pectin is studied in detail.

同时建立了样品中生物类黄酮的分光光度法测定方法和样品中果胶含量的咔唑显色法测定分析方法。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。