Objective: Heighten swimming pool water of urea testing quality, so diacetyl monoxime acetyl better to apply.

目的：提高游泳池水中尿素的檢測質(zhì)量www.欧美激情69，使二乙酰一肟法得到更好的應(yīng)用亚洲色图熟熟。

Methods: The original method diacetyl monoxime solution concentration of 2 g/L to switch to 10 g/L solids volume direct add to antipyrine dissolved of solution;DMA plus 10 ml water 2 ml 1 h after boiling liquid cooling, Pure water volume to 25 ml determination.

將原法二乙酰一肟溶液濃度2 g/L改為10 g/L的固體量直接加到安替比林溶液中溶解久久精品国内久精国品；水樣10 ml加DMA2 ml沸浴1 h后冷卻亚洲激情综合网，純水定容至25 ml測定。

Methods On the conditions of strong acid and calefaction,urea can react on antipyrine and diacetyl monoxime and become yellow which can be determined by colorimetric analysis in 450 nm with the ALLIANCE FUTURA continuous flow injection auto analysis system.

方法根據(jù)尿素在強酸和加熱條件下與安替比林及二乙酰一肟反應(yīng)呈黃色欧美午夜久久，在450nm比色定量的原理欧美换爱交换乱理伦片下载，選用FUTURA流動注射分析儀對游泳池水中的尿素進行測定，進行余氯干擾試驗日韩欧美国产视频，并將該方法與二乙酰一肟安替比林法進行比較XNXX学校老师免费。

Based on the absorption property of glyoxime which can be formed by addition reaction of aldehyde group and hydroxylamine in the UV-spectral region,spectrophotometric determination of glyoxal in glyoxal solution was proposed.

利用醛基與羥胺在酸性條件下的成肟反應(yīng)產(chǎn)物乙二醛二肟對紫外光的吸收特性，用紫外分光光度法測定乙二醛的含量国产欧美久久一区二区三区。

Mainfactors are as follows: standard solution在线观看无码视频网站、 regressive curve、 parallel experiment of sample操美女黄色污网站在线观看视频、 diacetyl monxime's reagent colorimetic methodA日韩黄片、 spectrophotometer、 sampling , etc .

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Study on an efficient process for the preparation of trifloxystrobin starting from 2-methylacetophenone bypartial oxidation,esterification,reaction with methoxyamine,bromization and condensation with 3'- acetophenone oxime.

以鄰甲基苯乙酮為原料日韩免费自拍图片视频网站大全，經(jīng)過高錳酸鉀的堿性氧化国产黄色视频观看，甲醇酯化，再與甲氧基胺鹽酸鹽肟化后1024看片国产日韩欧美，用N-溴丁二酰亞胺溴化国内精品久久久亚洲，最后和間三氟甲基苯乙酮肟縮合得到目標產(chǎn)物肟菌酯。

Ethoxycarbonyl-4,5-dimethyl-pyrrole (7) was prepared from ethylacetoacetate, ethyl formate and methyl ethyl ketone via oximination, Claisen condensation, and reductive condensation. The bromization of compound 7 gave 2-ethoxycarbonyl-3-bromo-4,5-dimethyl-pyrrole(8), which could be transferred to 2-ethoxy-carbonyl-3-brome-4-methyl-5-formyl-pyrrole (9) by the formolation.

由乙酰乙酸乙酯国产黄色免费在线视频网址、甲酸乙酯及丁酮等原料經(jīng)過肟化丁香五月激情黄色操一操、Claisen縮合、還原縮合成環(huán)得到2-乙氧羰基－4黄色网站免费亚洲，5-二甲基－吡咯(7)99re这里精品视频在线6，溴化生成2-乙氧羰基－3-溴497久久盗摄，5-二甲基－吡咯(8)欧美操逼性交，最后經(jīng)過甲酰化反應(yīng)得到目標產(chǎn)物2-乙氧羰基－3-溴－4-甲基－5-甲酰基－吡咯(9)亚洲中文字幕久久。

Firstly, 3-ethylthiobutanal was prepared from crotonaldehyde reacting with ethanehiol in triethylamine with high yield. Secondly, methyl acetoacetate was converted to 6-ethylthiohept-3-en-2-one by three steps via hydrolysis, condensation with 3-ethyltio-butanal and dehydration, then 6-ethylthiohept-3-en-2-one was cycloco ndensed with dimethyl malonate by Michael addition and Claisen condensation, followed by saponification and decarboxylation to give the intermediate of 5-(2-ethylthiopropyl)-cyclohexane-1,3-dione.

首先久草手机av，以巴豆醛與乙硫醇為原料，在三乙胺的催化作用下高收率制得3-乙硫基丁醛女人十八黄色视频；然后從乙酰乙酸甲酯出發(fā)黄色A片洗澡，通過堿水解、與3-乙硫基丁醛縮合久久九九久91精品国产综合、脫水三步反應(yīng)合成6-乙硫基-3-烯-2-庚酮黄色视频在做在线，接著6-乙硫基-3-烯-2-庚酮與丙二酸二甲酯通過Michael加成和Claisen縮合成環(huán)，再通過皂化和脫羧反應(yīng)生成中間體5-[2-丙基]-1免费欧美操屄，3-環(huán)己二酮亚洲另类日韩；再與丙酸酐反應(yīng)丙酰化嗯啊快点视频在线观看，最后與0-3-氯-2-丙烯基羥胺肟化色两性网欧美，得到目標化合物烯草酮。

These products include sodium percarbonate, percarbamide, 4Na 2SO 4·2H 2O 2·NaCl adduct, tertiary amine oxides, hydrazine hydrate, dihydroxy benzene, quaternary ammonium salt hydrogen peroxide and methylethyl ketone oxime.

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Inorganic chemistry ; hydrogen peroxide ; review ; sodium percarbonate ; percarbamide ; 4Na 2SO 4·2H 2O 2·NaCl adduct ; tertiary amine oxides ; hydrazine hydrate ; dihydroxy benzene ; quaternary ammonium salts hydrogen peroxide ; methylethyl ketone oxim

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