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?

本章利用熒光光度法和紫外吸收分光光度法研究了核酸對(duì)環(huán)丙沙星-Tb~(3+)體系的熒光增強(qiáng)效應(yīng)及其影響因素看黄色AAAB级视频，探討了其作用機(jī)理，提出了環(huán)丙沙星-Tb~(3+)配合物與核酸的作用模型美女黄男的插女的，并建立了DNA的選擇性測(cè)定方法内地50岁熟妇网站，并將其運(yùn)用于合成樣與血清中DNA含量的測(cè)定。

One method of preparation new membrane materials was presented with putting multi-wall carbon nanotube and carboxylic multi-wall carbon nanotube in collodion solution.

分別將碳納米管和羧基化碳納米管均勻分散在火棉膠溶液中凹凸在线导航AV网站，采用流涎法制備出碳納米管復(fù)合膜日韩美女精品一区二区；并用分光光度法對(duì)樣液、濾液中的間苯二酚和茜素紅的吸光度進(jìn)行了對(duì)比測(cè)定日韩操B，以考察膜的吸附性能日韩精品国语在线观看。

One method of preparation new membrane materials was presented with putting multi-wall carbon nanotube and carboxylic multi-wall carbon nanotube in collodion solution. Carbon nanotubes complex filtering membranes can be obtained by salivate method. Resorcin and alizarin red can be percolated using new membrane individually.

分別將碳納米管和羥基化碳納米管均勻分散在火棉膠溶液中，采用流涎法制備出碳納米管復(fù)合膜国内一级毛片免费不卡视频；并用分光光度法對(duì)樣液影音先锋女人鲁色资源网、濾液中的間苯二酚和茜素紅的吸光度進(jìn)行了對(duì)比測(cè)定，以考察膜的吸附性能男人天堂一道本在线视频。

We first studied the interaction mechanism of Erythrosin B with proteins by spectrophotometry and fluorospectrophotometry, calculated their binding number, binding constants and binding site, and estimated their binding type.

將分光光度法和熒光光度法結(jié)合99久久大黄片，首次研究了四碘熒光素與蛋白質(zhì)的作用機(jī)理，計(jì)算了結(jié)合數(shù)91色吧福利、結(jié)合常數(shù)和結(jié)合位置在线看男女AV免费网址不卡，判斷出結(jié)合類型。

A spectral-correction-integral- photometry method and its application in the measurement of the luminous flux of blue LEDs are introduced.

介紹了一種光譜校正積分光度法及其在藍(lán)光LED光通量測(cè)量中的應(yīng)用日韩欧一区二区三区四区，對(duì)測(cè)量中的各種不確定因素作了理論分析中国一级操逼片，并與單純的分光光度法和積分光度法的不確定度作了比較，證明該方法可實(shí)現(xiàn)極高的測(cè)量精度。

By synthetically analysizing the physical and chemical properties of all components and particle size, the content of F2641 in the JOB-iC is determined by gravimetric analysis after F2641 is seperated from HMX,TATB and PNP through ? alkali reflux. Determination conditions is set as follows the sample is boilingly refluxed for six hour in a constant temperature bath after adding lOOm! 8.0 ?? 0.1% NaOH. The solvent DMF saturated by TATB is used for extracting HMX,F21 and PNP from the sample and TATB is seperated by crucible filter G4. The mass precent of TATB is determined by extraction fractionation. The mass percent of PNP is measured by multiwavlength linear regression ultraviolet spectrophotometry. The testing conditions are set as follows:multiwavlength constitution: X=267nxn, 275nm, 283nm, 29mm, 299nm,the application scope of the Lambert-Beer law: the concentration of PNP is O.005?0.O25mgIml, the concentration of HMX is 0.060.3Omg/ml,absorption coefficents of PNP and HMX are solved by the slope of linear regression curve of absorbency- concentration of standard solution of PNP and HMIX for measuring wavelengthes,on the basis of the Lanibert-Beer law and absorbancy additivity principle, the slope of linear regression curve of A/E(1) and E1 of PNP and HMX solution is regarded as the concentration of PNP in the solution.

根據(jù)傳爆藥中各組分的物理717影视午夜理论片大全福、化學(xué)性質(zhì)及主體炸藥的粒度大小在线观看国产黄片视频，進(jìn)行綜合分析，確定了采用堿回流重量法測(cè)定JOB-1C 中F_(2641)的含量99re国产在线，測(cè)定條件：加入100ml濃度為8.0±0.1％的氫氧化鈉欧洲A∨国产在线，在恒溫水浴中煮沸回流6h；采用溶劑萃取法測(cè)定JOB-1C中TATB的含量色色色色色色色色色色69快射视频，選擇TATB飽和的二甲基甲酰胺為萃取溶劑特级大黄A片免费线观看网站，用G4坩堝式過(guò)慮器進(jìn)行萃取分離；采用多波長(zhǎng)線性回歸紫外分光光度法測(cè)定JOB-1C中PNP的含量久久久精品久久久久，通過(guò)實(shí)驗(yàn)確定了多波長(zhǎng)組合：λ=267nm久久无码A片，275nm，283nm九九性爱，291nm国产欧美日韩黄色视频，299nm；朗波—比耳定律的適用范圍為PNP濃度：0.005～0.025mg/ml自拍偷拍36，HMX濃度：0.06～0.30mg/ml一级毛片试看三分钟；在測(cè)定波長(zhǎng)下，對(duì)PNPa免费网站、HMX標(biāo)準(zhǔn)溶液的吸光度—濃度進(jìn)行線性回歸最新国产一区，由回歸曲線的斜率得出PNP、HMX的吸收系數(shù)国内小视频；根據(jù)朗波—比耳定律和吸光度加和性原理国产性交一级黄色视频，在測(cè)定波長(zhǎng)下，對(duì)PNPsu4.com、HMX 兩組分混合溶液A_i/E_HMX(i與E_PNP(i/E_HMX(i進(jìn)行線性回歸欧美A片精品，回歸曲線的斜率即為混合溶液中PNP的濃度。

In order to provide some scientific data for judging biological toxicity and bioavailability caused by heavy metals in sediments in Guilin, China, for the first time, the authors sampled sediments in different water areas in Guilin, and determined AVS by P-Amino dimethyl aniline dihydro chloride photometry through a set of acidification-ventilation-absorption AVS reaction unit, determined copper, lead, zinc, cadmium and nickel with tomic absorption spectrophotometry, mercury and arsenium with atomic fluorescence, and cipangopaludina cathayensis was selected as the tested species for bioavailability experiment.

首次以桂林水系沉積物為研究對(duì)象可以看视频的黄色网站，通過(guò)酸化－吹氣－吸收裝置导航福利136，用對(duì)氨基二甲基苯胺光度法測(cè)定沉積物中AVS含量，用原子吸收分光光度法測(cè)定SEM和間隙水中Cu久久va中文字幕影视、Pb白白发布国内在线视频、Zn、Cd毛片a视频、Ni含量国产av黄色片，用原子熒光法測(cè)定Hg、As含量国产免费污网站在线观看。

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環(huán)糊精測(cè)定過(guò)氧化苯甲酰的分光光度法最新欧美狂野日韩精品国产，并測(cè)定了β環(huán)糊精與過(guò)氧化苯甲酰和苯甲酸的包結(jié)比天堂AV在线播放最新版，隨著β-CD濃度的增大，可與BPO分別形成1：1或2：1的包容絡(luò)合物不卡av在线免费观看，包結(jié)常數(shù)分別為5.0×10~2和2.5×10~4免费黄色在线啊～啊～，與苯甲酸形成1：1的包容絡(luò)合物，包結(jié)常數(shù)為6.9×10~2www.99aiav100；由于包結(jié)物的吸光度值比過(guò)氧化苯甲酰的吸光度值大大增加，建立了一種當(dāng)β-CD存在下91麻豆国产福利，在水溶液中測(cè)定過(guò)氧化苯甲酰的方法伊人久久av一区二区三区。

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.

測(cè)定水中硝酸鹽氮含量有多種方法，主要包括酚二磺酸光度法国产对白自拍小视频免费观看、鍋柱還原法国产一级AA片有黄有粗毛片、戴氏合金還原法、離子色譜法日本女优一区二区、紫外分光光度法和電極法等性欧美老妇人牲交。

Methods After the sample of Fenneropenaeus chinensis, Litopenaeus vannamei, Liza haematocheila, Acanthogobius hasta, Mactra veneriformis, Aloidis laevis, Ostrea denselamellosa and Fenneropenaeus chinensis was digested with concentrated hydrochloric acid, the lead content in marine products was measured by fluorimetric method and the results were compared with dithizone spectrophotometry.

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