分光光度测定法

Third, sodium sulfoxylate formaldehyde is a kind of bleaching powder used in industry, which is prohibited from adding to food. In this part, we take it as an object to study, by using ion chromatography instrument which is equipped with autech DS-PLUS?

本章利用荧光光度法和紫外吸收分光光度法研究了核酸对环丙沙星-Tb~(3+)体系的荧光增强效应及其影响因素，探讨了其作用机理，提出了环丙沙星-Tb~(3+)配合物与核酸的作用模型，并建立了DNA的选择性测定方法，并将其运用于合成样与血清中DNA含量的测定。

Sodium periodate photometric method and flame atomic absorption spectrometric method.

锰含量的测定。高碘酸钠分光光度法和火焰原子吸收分光光度法

The level of PGE was assayed by spectrophotometer; Meanwhile, 3H-TdR incorporation method was used to detect ConA- and LPS- induced splenocytes proliferation and the production of interleukin-1 and IL-2. The content of antibodies to CII was determined by ELISA method. Pathological examination of articulus tissue was observed by Hematoxylin-eosin stain.

检测小鼠足爪肿胀度并对炎症进行评分；测定胸腺指数和脾脏指数；~3H-TdR参入法检测胸腺、脾淋巴细胞增殖反应；~3H-TdR参入法测定白细胞介素-1(interleukin-1，IL-1)和IL-2水平；ELISA法测定小鼠血清中抗CⅡ抗体含量；分光光度法检测足爪局部产生的前列腺素水平；HE染色法对关节组织作病理检查。

A novel method for determination of benzoyl peroxide with spectrophotometry was developed. Inclusion ratio of β cyclodextrin to dibenzoy peroxide and benzoic acid is obtained with spectrophotometry.The mechanism of the inclusion was studied,too. The results showed that β-CD react with dibenzoyl peroxide to form a 1:1 or 2:1 host-guest complex, with the apparent formation constants of 5.0× 10~2and 2.5× 10~4 , respectively.β-CD reacts with benzoic acid to form a 1:1 host-guest complex with the apparent formation constant of 6.9 × 10~2 after the dibenzoyl peroxide was reduced by hydroxyl ammonium chloride.

建立了用β环糊精测定过氧化苯甲酰的分光光度法，并测定了β环糊精与过氧化苯甲酰和苯甲酸的包结比，随着β-CD浓度的增大，可与BPO分别形成1：1或2：1的包容络合物，包结常数分别为5.0×10~2和2.5×10~4，与苯甲酸形成1：1的包容络合物，包结常数为6.9×10~2；由于包结物的吸光度值比过氧化苯甲酰的吸光度值大大增加，建立了一种当β-CD存在下，在水溶液中测定过氧化苯甲酰的方法。

The comparison analysis of nitrate nitrogen determination is conducted with the same standard solution and natural water samples by two methods of spectrophotometric method with phenol disulfonic acid and ultraviolet spectrophotometer.

测定水中硝酸盐氮含量有多种方法，主要包括酚二磺酸光度法、锅柱还原法、戴氏合金还原法、离子色谱法、紫外分光光度法和电极法等。

A modified analysis method based on the determination of ozone—indigo disulphonate spectrophotometer(GB/T 15437-1995) in gas phase has been developed to detect the concentration of ozone in liquid phase. An analytical condition of λmax=612～615 nm,ε=20 000 L/, pH 2 is obtained by the titration of indigo disulphonate. Compared with potassium iodide method,it shows a higher precision and accuracy,CV＜3.0%. The results also prove that blank experiment will bring about 5.0%systematic error.

在气相臭氧浓度的靛蓝二磺酸钠分光光度法(GB/T15437-1995)基础上提出了液相臭氧浓度的测定方法，采用靛蓝二磺酸钠标准曲线法代替采用易分解的臭氧标准曲线法，得出测定条件λmax=612～615 nm、ε=20 000 L/、pH为2，通过碘量法比较实验，说明新的测定方法具有较高的精度和准确度，相对标准偏差小于3.0%；比较结果表明忽略空白实验将引入5.0%的系统误差。

The antifungal activities of these materials were investigated and build foundation to develop low poison plant antifungal products. In experiment, polyphenols were extracted by reflux ectraction method which applyed petroleum ether to degrease and methyl alcohol solvent. Phenolic hydroxyl were examined and inspected by colour-developing reaction and the content of total polyphenols was determined by UV-spectrophotometry. Screening test were performed to the antifungal activities of polyphenol extraction by the tube dilution method to the selected ten pathogenic fungus such as Dothiorella gregaria, Rhizoctonia solani, Phyllosticta pirina, and the minimal inhibitory concentration were measured. The column chromatography and thin layer chromatography were applyed to separate and analyse cortex extracts of Dracaena cochinchinensi Lour.

实验部分采用以石油醚脱脂，甲醇为溶剂的回流提取法来提取植物多酚，用显色反应检识酚羟基；采用紫外分光光度法对多酚粗体物进行总多酚含量的测定；选取了聚生小穴壳菌、立枯丝核菌、梨叶点霉等10株常见农林业致病真菌，采用试管液基稀释法对多酚粗提取物进行了抗真菌活性筛选试验，并测定其最低抑菌浓度；采用柱层析法和薄层层析法对其中抑菌效果较好的龙血竭进行分离分析，根据其中3种化合物的光谱数据UV、IR、~(13C-NMR、1H-NMR和MS鉴定其结构。

Analysis on main points for determination of chlorine dioxide by iodometric method ;2. The experiment results show: To measure sulfide in wastewater by iodometric method may have errors because the interferent can not be removed.

用碘量法测定废水中的硫化物，可能因无法消除干扰而使测定结果存在较大误差；对于同一废水样品，当碘量法和亚甲基蓝分光光度法的测定结果存在显著性差异时，可用Pb2半定量法进行判定；对于某些化纤企业的废水，用氢氧化钾-乙醇溶液洗涤沉淀，可消除碘量法测定的干扰。

This thesis studies the analytical methods of determination of Leucogen and Hydroxymethylnicotinamide by Ultraviolet and Atomic Absorption Spectrscopy.

本文研究了分光光度法和原子吸收光谱法测定利血生及羟甲基烟酰胺的分析方法，提出了利血生的三种测定方法和羟甲基烟酰胺的一阶导数峰-零法的测定新方法，并用于实际样品的测定，获得满意结果。

These methods include a photocatalytic degradation of methyl orange solution-spectrophotometric method to measure the degradation rate of organic matter by self-cleaning glass, a UV-Vis spectrophotometric scanning procedure to measure the transmittance and a hydrophility measuring method by using a contact angle meter.

详细研究了用以表征自洁净玻璃主要性能的各种测定方法：采用紫外光辐照降解甲基橙－分光光度法测定自洁净玻璃对有机物的降解效率即光催化活性；利用紫外可见光分光光度计扫描测量其透过率光谱曲线；用接触角测定仪测量其样品表面的亲水性。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。