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差减法
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  subtraction method
     Cr(Ⅵ) was extracted and measured from pH4.5 buffer solution with APDC_MIBK extraction system. Cr(Ⅲ) was calculated by subtraction method.
     以APDC_MIBK为萃取体系 ,在 pH为 4 .5的缓冲溶液中萃取测定铬 (Ⅵ ) ,以差减法求铬 (Ⅲ ) .
短句来源
     Application of Dissimilar Subtraction Method of Soil Fertility in Recommend Fertilizer Practice for Maize Planting in Yellow Clay Soil
     地力差减法在黄粘泥土玉米推荐施肥中的应用研究
短句来源
     The subtraction method was used to get the precise content of H+ of HOAc.
     同时,在分析测定酸的重量百分浓度时,利用“差减法”得到了H+的准确含量。
短句来源
     The total phosphate hydrolysed from polyphosphate in 1.0mol/L nitric acid at 100℃ was measured with the same method, so the content of phosphate could be achieved by subtraction method.
     聚磷酸根的含量则在1mol/L的HNO3介质中于沸水浴中水解后同法测总PO43-,用差减法求出。
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  “差减法”译为未确定词的双语例句
     Determination of Fe 2O 3, Al 2O 3, CaO, MgO, MnO 2, NiO, TiO 2 with emission spectrum method and determination of K 2O, Na 2O with flame photometric method were studied. The content of SiO 2 was got by difference method.
     本文研究了发射光谱法测定Fe2 O3 、Al2 O3 、CaO、MgO、MnO、NiO、TiO2 和火焰光度法测定K2 O、Na2 O ,然后以差减法得出SiO2 含量。
短句来源
     Asparagus bean absorbed 48. 6% of P2O5, 21. 7% of N and 28. 0% of K2O from soil, others were supplemented by fertilizing and root nodule bacterium.
     据差减法计算,豇豆吸收N的46.8%、P2O5的21.7%、K2O的28%来自于土壤,其余养分则由施肥及根瘤菌作用补充。
短句来源
     Hg22+was oxidized HG2+by KMnO4 solution and determined Hg22+ and Hg2+. At last,counted Hg、Hg22+Hg2+ Content of the Sample by means of Sbutraction.
     另一份用高锰酸钾氧化Hg22+为Hg2+,测定Hg22+、Hg2+含量,然后用差减法求出Hg、Hg22+和Hg2+的含量。
短句来源
     In the cotton harvest time, sampling to analyze, according to the subtraction counts nitrogen fertilizer utilization is 48.58%~53.15% in the cotton with drip irrigation, utilization of phosphorus is 18.73%~24.84%.
     收获期棉株取样化验分析,根据差减法求得滴灌棉花氮肥利用率为48.58%~53.15%,磷肥利用率为18.73%~24.84%。
短句来源
     As(V) was evaluated by difference.
     以差减法求得As(V)含量。
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  相似匹配句对
     As(V) was evaluated by difference.
     以减法求得As(V)含量。
短句来源
     The content of Sb(Ⅴ) is found by difference.
     减法得Sb(Ⅴ)。
短句来源
     The prognosis of MFH of head and neck is poor.
     预后
短句来源
     ⑧poor prognosis.
     预后
短句来源
     On "Subtracting" Design
     论“减法”设计
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  subtraction method
First, a subtraction method of using empty-target measurements allowed the cross section σtot to be evaluated directly because of a low level of the electromagnetic background.
      
Mobile granules were then segmented from a time-lapse image stack by an adaptive background subtraction method.
      
Employing for ethylene removal the subtraction method introduced in gas chromatography very early by Ray, the achieved separation of inorganic gases was usefully applied for the determination of inorganic gases traces in high purity ethylene.
      
In order to facilitate the use of contour matching, a new approach that combines the adaptive background subtraction method with the border tracing technique was developed and is used to automatically generate the initial contour.
      
The 9q32-34 collection was screened with a subtracted probe enriched in striatal sequences using a directional tag PCR subtraction method.
      
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Decompose lithium ores with a mixture of HF and H_2SO_2, expel HF by evaporation. Separate Fe and Al. by means of urea, and separate Ca by precipitation with saturated oxalic acid. The interference of potassium may be corrected by calibration curve method. The amounts of Li_2O (apparent) and K_2O in solution may be determined by flame photometry. The actual lithium contents obtained by method of difference have been compared with that of control samples contaning Li_2O<0.11%, the absolute deviation is found...

Decompose lithium ores with a mixture of HF and H_2SO_2, expel HF by evaporation. Separate Fe and Al. by means of urea, and separate Ca by precipitation with saturated oxalic acid. The interference of potassium may be corrected by calibration curve method. The amounts of Li_2O (apparent) and K_2O in solution may be determined by flame photometry. The actual lithium contents obtained by method of difference have been compared with that of control samples contaning Li_2O<0.11%, the absolute deviation is found to be less than .03%.

將含鋰矿样用HF—H_2SO_4分解,并蒸发除去HF,然后用尿素分离Fe和Al,以真飽和草酸分离Ca真至于鉀对鋰的影响,可用校正曲线法改正。溶液中鋰(待校正的)及鉀的含量均用火焰光度法测定。用差减法所得真实鋰含量与管理矿样比较,其耙对誤差(当Li_2O%小于0.11%时)小于+0.03%

The present paper is concerned with a study of 1-pheuylthiocarbohydrazide (PTCH) as a reagent of spectrophotometric determination of chromium and vanadium. The machanisms for the reactions between Cr_2O_7~m,Vo_3~- and PTCH under testing conditions have also been investigated, namely (yellow)+2CrO_2~-(or Cr~(++))+3H_2o (1)The red ternary complex (or ion-pair) can be extracted with amyl alcohol. The analogous reaction (1) for vanadium is occurred, but that of (2) is absent. Thus the concentration of vanadium in...

The present paper is concerned with a study of 1-pheuylthiocarbohydrazide (PTCH) as a reagent of spectrophotometric determination of chromium and vanadium. The machanisms for the reactions between Cr_2O_7~m,Vo_3~- and PTCH under testing conditions have also been investigated, namely (yellow)+2CrO_2~-(or Cr~(++))+3H_2o (1)The red ternary complex (or ion-pair) can be extracted with amyl alcohol. The analogous reaction (1) for vanadium is occurred, but that of (2) is absent. Thus the concentration of vanadium in mixture solution can be measured by difference.Optimal conditions for colour development in chromium(Ⅵ) and vanadium (Ⅴ) PTCH system are: acidity 0.2-6×10~(-2)MH_2so_4, and heating at 65-70℃ for 5 minutes; the wavelengths of maximal absorption for chromium is 490nm(red ion-pair),and the molar absorptivity is 1.0×10~4; 424nm for chronium and vanadium (yellow products).Making use of the reagent for determination of chromium and vandium in the water of the Yellow River, waste water, seme metallic salts as well as soil,we obtained satisfactory results.

本文研究应用1-苯基硫代卡巴肼(PTCH)作为铬和钒的连续光度法试剂。反应机理是红色三元络合物能被戊醇萃取。钒有类似的反应(1),但无反应(2),故可由差减法求得。试剂的选择性较好。以之用于水、污水、土壤、某些金属盐类中铬或钒的测定,结果尚为满意。

The extraction and separation of As(Ⅲ) from the sample solution was made by benzene in HCl medium. The total inorganic arsenic was extracted by benzene as above after the prereduction of electroinactive As(V) by KI in HCL medium. In the presence of Au(Ⅲ) and Cu(Ⅱ),1.2M HClO_4 was used as a supporting electrolyte. Anodic stripping voltammetry at a glassy carbon electrode for the quantitative determination of As (Ⅲ) and the total inorganic arsenic in HCL and industrial waste water has been proposed. As(V) was...

The extraction and separation of As(Ⅲ) from the sample solution was made by benzene in HCl medium. The total inorganic arsenic was extracted by benzene as above after the prereduction of electroinactive As(V) by KI in HCL medium. In the presence of Au(Ⅲ) and Cu(Ⅱ),1.2M HClO_4 was used as a supporting electrolyte. Anodic stripping voltammetry at a glassy carbon electrode for the quantitative determination of As (Ⅲ) and the total inorganic arsenic in HCL and industrial waste water has been proposed. As(V) was evaluated by difference.The lowest determinable concentration is 0.08 ug/10ml.

在HCl介质中用苯从样品溶液中萃取分离As(Ⅲ)。加入KI在HCI介质中予先还原As(V)后,再用苯萃取分离无机砷总量。在Au(Ⅲ)与Cu(Ⅱ)存在下,1.2M HClO_4作为支持电解质,用玻璃碳电极阳极溶出伏安法测定HCl及工业废水中As(Ⅲ)及无机砷总量。以差减法求得As(V)含量。测定砷的最低浓度为0.08微克/10亳升。

 
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