美女裸体无遮挡掩免费视频

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    1. 服務項目

      微量元素分析
      發布時間: 2021-03-09 13:01:43來源:上譜分析瀏覽次數: 1490
      測試項目:全巖微量元素分析

      測試對象:巖石、土壤粉末樣品、天然水樣、消解溶液、高純物質雜質等樣品

      測試周期:30-45個工作日,全套主微量元素分析可同步進行,周期30-45個工作日??商峁悠窚y試加急服務,加急樣品最短周期20個工作日。

      送樣要求:1、樣品量需約2 g,粒度≥200 目,請務必逐個自查,標準為將樣品粉末捻在手心無明顯顆粒感;2、編號清晰,紙袋折疊封裝;3、請勿用訂書機封訂;4、塑料袋包裝或樣品灑出的退回。

      完成標準:前處理在超凈室100級超凈臺內進行,保證監測空白及樣品無污染,標樣和重復樣在允許誤差范圍內。

      方法描述:
      7.1
      全巖微量元素含量分析

      全巖微量元素含量在武漢上譜分析科技有限責任公司利用Agilent 7700e ICP-MS分析完成。用于ICP-MS分析的樣品處理如下:(1)將200目樣品置于105 ℃烘箱中烘干12小時; (2)準確稱取粉末樣品50 mg置于Teflon溶樣彈中;(3)先后依次緩慢加入1 ml高純HNO3和1 ml高純HF;(4)將Teflon溶樣彈放入鋼套,擰緊后置于190℃烘箱中加熱24小時以上;(5)待溶樣彈冷卻,開蓋后置于140℃電熱板上蒸干,然后加入1 ml HNO3并再次蒸干;(6)加入1 ml高純HNO3、1 ml MQ水和1ml內標In(濃度為1 ppm),再次將Teflon溶樣彈放入鋼套,擰緊后置于190℃烘箱中加熱12小時以上;(7)將溶液轉入聚乙烯料瓶中,并用2% HNO3稀釋至100 g以備ICP-MS測試。

      7.2 Trace element analyses of whole rock

      Trace element analysis of whole rock were conducted on Agilent 7700e ICP-MS at the Wuhan SampleSolution Analytical Technology Co., Ltd., Wuhan, China. The detailed sample-digesting procedure was as follows: (1) Sample powder (200 mesh) were placed in an oven at 105 ℃ for drying of 12 hours; (2) 50 mg sample powder was accurately weighed and placed in a Teflon bomb; (3) 1 ml HNO3 and 1 ml HF were slowly added into the Teflon bomb; (4) Teflon bomb was putted in a stainless steel pressure jacket and heated to 190 ℃ in an oven for >24 hours; (5) After cooling, the Teflon bomb was opened and placed on a hotplate at 140 ℃ and evaporated to incipient dryness, and then 1 ml HNO3 was added and evaporated to dryness again; (6) 1 ml of HNO3, 1 ml of MQ water and 1 ml internal standard solution of 1ppm In were added, and the Teflon bomb was resealed and placed in the oven at 190 ℃ for >12 hours; (7) The final solution was transferred to a polyethylene bottle and diluted to 100 g by the addition of 2% HNO3.

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      美女裸体无遮挡掩免费视频