The polyfluoroalkylation lactonization of 4-pentenoic acid with 4-chlorododecafluorobutyl iodide initiated by several sulfur-oxy acid salts, such as thiourea dioxide, rongalite, sodium sulfite, sodium bisulfite and sodium disulfite, to give the correponding fluorine-containing lactones was intensively studied.
以4-氯八氟碘代丁烷和4-戊烯酸生成含氟丁内酯的反应为模板,详细研究了不同硫含氧酸盐、溶剂和温度对反应的影响。
The validity Was confirmed by dehydration reactions of hydrated sulfates.
并经系列含水硫酸盐脱水反应实验验证。
The structure and sodium sulphate content of five market low-concentration naphthalene water-reducer were characterized by IR and gravimetric method in GB/T 8077—2000 respectively.
通过红外光谱法表征了5种市售低浓萘系减水剂的结构差异,采用GB/T8077—2000重量法检测了它们的硫酸钠含量,并考察了它们在相同外加剂掺量时,结构及硫酸钠含量差异对不同水泥的净浆流动度和混凝土性能的影响。
determination of mineral sulfate content-titrimetric method
无机硫酸盐含量的测定-滴定法
Boric acid for industrial use-Determination of sulphate content by visual turbidimetry
GB/T12684.4-1990工业硼酸硫酸盐含量的测定目视比浊法
Boric acid for industrial use-Determination of sulphate content by reduction and titrimetry
GB/T12684.3-1990工业硼酸硫酸盐含量的测定还原滴定法
Sodium hydroxide for chemical fiber use-Determination of sulphate mass fraction-Barium sulphate gravimetric method
GB/T11213.5-1989化纤用氢氧化钠中硫酸盐含量的测定硫酸钡重量法(甲法)
Determination of mineral sulfate content in detergents--Gravimetric method
GB/T15817-1995洗涤剂中无机硫酸盐含量的测定重量法
surface active agents-washing powders-determination of inorganic sulfates-gravimetric method
表面活性剂－粉末洗涤剂－硫酸盐含量测定-重量法
Use of Titration and Spectrophotometry for Determination of Sulfite in Tremella
滴定法与比色法检测银耳中亚硫酸盐含量
Ammonium hydrogen carbonate for industrial use--Determination sulphate content -- Visible turbidimetric method
GB/T6276.4-1986工业用碳酸氢铵硫酸盐含量的测定目视比浊法
Surface active agents--Determination of mineral sulfate content--Titrimetric method
GB/T6366-1992表面活性剂无机硫酸盐含量的测定滴定法
Sodium hydroxide for chemical fiber use-Determination of sulphate mass fraction-Turbidimetric method
GB/T11213.6-1989化纤用氢氧化钠中硫酸盐含量的测定比浊法(乙法)
Weighing Method-Measurement for Sulfate Radical Content in Nitrate
硝盐中硫酸根含量的测定——重量法
Gauging the Amount of Iodine in Salt on Sale by the Way of Na_2S_2O_3 Titration;
硫代硫酸钠滴定法测定市售食盐中的碘含量
Determination of diltiazem hydrochloride sustained release capsules by RP-HPLC
RP-HPLC法测定盐酸地尔硫缓释胶囊中盐酸地尔硫的含量
The study for Sulfate(sulfite) saline soil in different soil dry density and the law between Salt and sodium content and frost heave force
硫酸(亚硫酸)盐渍土不同土干密度和硫酸钠含量盐-冻胀力规律试验研究
Sodium, sulfate, magnesium, calcium, carbonate, bicarbonate, chloride, and boron should be determined in a water anylasis.
水质分析要测定钠、硫、镁、钙、碳酸盐、重碳酸盐、氯和硼的含量。
Experimental Study of Gold-bearing Sulfide Ore by Thiosulfate Leaching Gold Process
含金硫化矿硫代硫酸盐浸金试验研究
Content of Sulphate Reduing Bacteria in the Sediment on the East Side of Beibu Gulf and Its Significance
北部湾东侧沉积物硫酸盐还原菌含量及其意义
Discussion on Several Determination Methods of Carbonate in FGD Gypsum
脱硫石膏中碳酸盐含量的几种测定方法探讨