碳酸钠

In preparation of sodium peroxocarbonate, the stability of sodium peroxocarbonate was increased as magnesium sulfate and sodium silicate were added.

因此如何提高过碳酸钠的稳定性是需要研究的问题。

The experimental conditions for measurement on the content of aluminium, calcium, magnesium, manganese, phosphor, silicon and titanium using ICP-AES method according to GB/T6730.63—2006 have been tested and analyzed. In the experiments the iron ore sample is decomposed and extracted using sodium carbonate/sodium tetraborate with proper acidity as the flux and then a working curve is drawn up using extremely pure ferric oxide (F2O3) as the primitive. And in the end the correlation coefficient r attains to 0.999 and above.

试验ICP-AES法测定铁矿石中铝、钙、镁、锰、磷、硅和钛国家标准方法GB/T6730.63－2006的实验条件，用碳酸钠/四硼酸钠作熔剂分解铁矿石样品，适当的酸度浸取，以高纯三氧化二铁打底作工作曲线，相关系数r达0.999以上。

II: ① take a thin wire, one end with sand paper wipe, and then lightson alcohol to non-yellow flame ignition,② wire with the end of the water dip, and then dip a number of sodium chloride or anhydrous sodium carbonate powder,③ ignited a new spirit lamp (lamp wick is clean, pure ethanol),④ the stained sodium salt powder on the wire on the ignitiontip, when there is a sharpsmall yellow flame, which is sodium flame.

方法二：①取一条细铁丝，一端用砂纸擦净，再在酒精灯外焰上灼烧至无黄色火焰，②用该端铁丝沾一下水，再沾一些氯化钠或无水碳酸钠粉末，③点燃一盏新的酒精灯，④把沾有钠盐粉末的铁丝放在外焰尖上灼烧，这时外焰尖上有一个小的黄色火焰，那就是钠焰。

The thermodynamic calculation shows that it needs to consume 065 t of Na2CO3 in treating pseudoleucite syenite ore per ton, and about 95％ Na2CO3 could be recycled.

烧结反应实验结果表明，采用碳酸钠为助剂，假白榴正长岩粉体在760～880 ℃条件下反应10～15 h，矿石中主要矿物的分解率可达971％。

It indicates that when the pseudoleucite syenite was sintered at 760-880 ℃ for 1.0-1.5 h,with the sodium carbonate as the additive,the decomposition rate of minerals in the pseudoleucite syenite could reach 97.1%.

在综合分析假白榴正长岩物相组成的基础上，以碳酸钠为助剂，分解假白榴正长岩中主要矿物相，对其进行热力学分析，并与石灰石烧结法进行比较。

The mineral trona, a compound of sodium carbonate and bicarbonate, is one naturally occurring alkali. It may be mined or recovered from dry lake bed s.

世界上有少数地方有矿物天然碱，这种矿石为二碳酸三钠，即碳酸钠石，通常蕴藏在干湖底。

The mineral trona, a compound of sodium carbonate and bicarbonate, is one naturally occurring alkali. It may be mined or recovered from dry lake beds.

世界上有少数地方有矿物天然碱，这种矿石为二碳酸三钠，即碳酸钠石，通常蕴藏在干湖底。

The mineral trona, a compound of sodium carbonate and bi carbonate , is one naturally occurring alkali. It may be mined or recovered from dry lake beds.

世界上有少数地方有矿物天然碱，这种矿石为二碳酸三钠，即碳酸钠石，通常蕴藏在干湖底。

The mineral trona, a compound of sodium carbonate and bicarbonate, is one naturally occurring alkali. It may be mined or recover ed from dry lake beds.

世界上有少数地方有矿物天然碱，这种矿石为二碳酸三钠，即碳酸钠石，通常蕴藏在干湖底。

The mine ral trona, a compound of sodium carbonate and bicarbonate, is one naturally occurring alkali. It may be mine d or recovered from dry lake beds.

世界上有少数地方有矿物天然碱，这种矿石为二碳酸三钠，即碳酸钠石，通常蕴藏在干湖底。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。