硫代硫酸钠

The reaction of calcium L-threonate with hydrogen bromide in acetic acid readily yields (2S, 3S)-2, 4 -dibromo-3 -hydroxy butanoic acid which was further converted into methyl (2s, 3S)-2,4-dibromo-3-hydroxybutanoate by treatment of methanol.

在化合物12上引入氨基甲酰基可用二氯磷异氰酸酯、氯乙酰异氰酸酯或氯磺酰异氰酸酯，随之引入的二氯磷酰基、氯乙酰基或氯磺酰基可分别用碳酸氢钠、N-甲基二硫代氨基甲钠或亚硫酸钠脱去。

Solid superacid ; Sodium thiosulphate ; Photocatalytic oxidation ; TiO_2; WO_3

固体超强酸；硫代硫酸钠；光催化氧化；二氧化钛；三氧化钨

As a result of recent world-widediscussions on the possible harmfulness of sulphites, theJoint FAO/WHO Expert Committee on Food Additives has assessed the intake of sulphur dioxide andrelated compounds, suchas calcium, potassium andsodium hydrogen sulphite; calcium, potassium and sodiummetabisulphite; calcium, potassium and sodium sulphite;and sodium thiosulphate.

由於最近全世界关於硫化物的可能的有害，在食品添加剂的联接FAO/WHO专家委员会的讨论估计了二氧化硫入口和相关化合物， suchas钙，钾和钠氢硫化物；钙、钾和钠偏亚硫酸氢盐；钙、钾和亚硫酸钠；并且钠硫代硫酸盐。

Titrate the liberated iodine with 0.1 M sodium thiosulphate, using 0.5 ml of starch solution R, added towards the end of the titration, as indicator.

用0.1 M的硫代硫酸钠滴定游离碘，加入0.5ml淀粉溶液作指示剂，滴定至终点。

Titrate the liberated iodine with 0.1 M sodium thiosulphate, using 0.5 ml of starch solution R, added towards the end of the titration, as indicator.

用0.1 M的硫代硫酸钠滴定游离碘，加入0.5ml淀粉溶液作指示剂，滴加至终点。

Sodium Thiosulphate, Crystal, Pentahydrate

Reagent 硫代硫酸钠，晶体，五水化物，试剂 500 g

Methods:According to national drug criterion of xylitol i njection,we adopted sodiumthiosulfate titrating method to determine the content of the xylitol,and carried on the methodology,including linearity range、prec ision、stability、average recovery and so on.

参照国家药品标准，采用硫代硫酸钠滴定法进行木糖醇注射液中木糖醇的含量测定，并进行方法学考察，包括线性范围、精密度、稳定性、加样回收率等。

Above 98.5% of iron is removed by goethite method. Copper is separated using Na_2S_2O_3 as precipitator.

最后利用硫代硫酸钠从溶液中沉淀铜使镍保留在溶液中。

The materials are gold mine of low sulfur content, calcine or gold contain abatement. Cyanogens lixiviant is alkaline thiourea, stabilizer is sodium sulphite or sodium silicate, they constitute high stability alkaline thiourea system, and bland oxidizing agent is potassium ferricyanide with moderate electric potential during sunking process.

本发明以低硫含量的金矿、焙砂或含金废料为原料，以碱性硫脲为无毒的代氰浸出剂，以亚硫酸钠或硅酸钠为稳定剂，组成高稳定性碱性硫脲体系，浸出过程中以具有适中电势的铁氰化钾为温和氧化剂。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐