free sulfur

Simultaneous Determination of Free Sulfur Dioxide and Total Iron in Wine by Reversed Flow Injection with Spectrophotometric Detection

反向流动注射法同时比色测定葡萄酒中的总铁和游离二氧化硫

Objective : To establish a method for determination of free sulfur dioxide and total sulfur dioxide in wine by automatic potentiometric titration .

目的：建立自动电位滴定法直接测定葡萄酒中游离SO2、总SO2的方法。

The aim of this research was to decrease the residual of sulfur dioxide and control the release of free sulfur dioxide in malolactic fermentation .

本文研究目的是在发挥二氧化硫的作用下，尽量地减少其残留量和控制游离二氧化硫在苹果酸乳酸发酵中的释放。

Meanwhile , the removal of the free sulfur from the chalcopyrite will facilitate the ion diffusion and the further oxidative solution of chalcopyrite .

同时，清除黄铜矿表面氧化溶解产物&单体硫后，有助于离子扩散和黄铜矿的进一步氧化溶解。

Results : The RSD was 0.53 % ~ 0.76 % , the recovery rate for free sulfur dioxide was 90.4 % ~ 99.4 % . Compared with standard method , the relative deviation for total sulfur dioxide was less than 1.0 % .

结果：该方法的变异系数为0.53%～0.76%，游离SO2测定回收率为90.4%～99.4%，总SO2测定与国标法相对相差不超过1.0%。

Furthermore , the diesel fraction produced by this method was free from sulfur and nitrogen . After all , it was a green environment-friendly liquid fuel .

另外，该研究方法制备的类柴油馏分无硫无氮，不失为一种绿色环保型液体燃料。

Besides , the fuels with ultra-low level of sulfur or free of sulfur are required for hydrogen fuel cell if its hydrogen is produced from the fuels .

另外，在氢源燃料电池系统中，如果氢来源于燃料油，那么必须使用超低硫或无硫燃料油。

Isomerized gasoline is the cleanest high-octane gasoline component , which is free of sulfur , olefin and aromatics .

异构化汽油不含硫、烯烃及芳烃，是最洁净的高辛烷值汽油组份。

The very hot gases , high in CO and H2 , and nearly free of NOx and sulfur , then exit into the boiler furnace .

随后富含一氧化碳和氢气、不含氮氧化物和硫磺的高温煤气，进入到锅炉炉膛。