农业用硫酸镁产品指标筛选及确定

为确定农业硫酸镁产品指标,通过收集分析农业用硫酸镁企业标准及产品田间肥效试验数据,开展样品检测等。结果表明:筛选镁(Mg)、硼(B)、铁(Fe)、水不溶物、pH、水分、汞(Hg)、砷(As)、镉(Cd)、铅(Pb)、铬(Cr)为农业用硫酸镁产品指标,并确定其指标值分别为镁8.5%、硼0.3%、铁0.2%、水不溶物1.0%、pH3.0~7.0、水分含量≤7.0%、Hg含量≤5 mg·kg~(-1)、As含量≤10 mg·kg~(-1)、Cd含量≤10 mg·kg~(-1)、Pb含量≤50mg·kg~(-1)、Cr含量≤50mg·kg~(-1)。

Product Indicators Selection and Determination of Agricultural Magnesium Sulfate

In order to determine the index of agricultural magnesium sulfate products,the samples were tested by collecting and analyzing the data of the field test and the field efficiency test of magnesium sulfate.The results showed that Magnesium(Mg),boron (B),iron (Fe),water insoluble matter,pH,moisture,mercury (Hg),arsenic(As),cadmium (Cd),lead (Pb) and chromium (Cr) were screened as indicators of agricultural magnesium sulfate product,then the specific index value was determined,such as Mg 8.5%,B 0.3%,Fe 0.2%,water insolubles 1.0%,pH 3.0~7.0,Hg≤5 mg?kg.-1,As≤10 mg?kg.-1,Cd≤10 mg?kg.-1,Pb≤50 mg?kg.-1,Cr≤50 mg?kg.-1.