Weigh 0.2g sample Calcium, accurate to 0. O001g, after adding 50mL dissolved in distilled water, was dropped by a pipette 0.05mol / L EDTA standard solution of about 250mL (close to the titration end point is appropriate, role of sodium sulfate, and then added l0mLl0% NaoH solution, sodium sulfate, agents, 1% Calcium red indicator 0.1g, continue with EDTA standard solution titration until the solution becomes pure blue from red just as the end point, the recording volume consumed EDTA standard solution, calculated as calcium formate content measurement results are shown in Table 2, From Table 2, high-precision measurement method, mean deviation and coefficient of variation were less than 0.2%;. and easy to operate, the end color keen German study found that calcium formate add l.3% in piglets when can improve the feed conversion rate of 7 to 8 percent; add 0.9% can reduce the incidence of diarrhea; 1.5% can improve piglet growth rate l.2%, feed conversion rate of 4%; 1.5% and 175mg / kg copper increase the growth rate of 21%, feed conversion rate of 10%. Domestic research showed that the addition of calcium formate l ~ 1.5% in the first eight piglets Sunday grain, and prevented the occurrence of diarrhea and dysentery, improve the survival rate, what is sulfuric acid sodium, feed conversion rate of 7 to 10% sodium sulfate, feed consumption decreased by 3.8%, pigs daily gain of 9 to 13%; adding a calcium silage can improve the content of lactic acid, butyric acid content reduction increase silage nutrients. sulfuric acid trisodium use sodium sulfate, Zhengzhou Longda Chemical (certified merchants) are provided by Zhengzhou Longda Chemical Products Co., road Zhiyuan, temper forward. Zhengzhou Longda Chemical Products Co., Ltd. (www.longdahuagong.com/) aims to become and you win symbiosis, strategic partners to move forward, more determined to become the most influential of inorganic acid companies, and you leap together to success!