重铬酸钾

The electrolyte buffer for the anion separation consisted of 40 mmol/L boric acid -1.8 mmol/L potassium dichromate -2 mmol/L sodium tetraborate (pH 8.6), and tetramethyl ammonium hydroxide was used as electro-osmotic flow modifier.

阴离子测定采用的缓冲体系为40mmol/L硼酸-1.8mmol/L重铬酸钾-2mmol/L硼酸钠(pH8.6)，氢氧化四甲铵为电渗流改性剂，5种阴离子在4.6min内达到基线分离，检出限为0.10~1.85mg/L。

FeCl_3 - K_2 Cr_2O_7 volumetric analysis is used for the determination of metal Ferrum in vanadium residue, which abstains from the use of mercury, simplifies device, improves the speed of analysis.

采用三氯化铁一重铬酸钾容量法测定钒渣中的金属铁的含量，消除了汞害，简化了装置，提高了分析速度，适于工业分析。

To further explore tillage practices for improving soil structure, the effect of different tillage practices on the structure and organic carbon of tilth soils were investigated using routine method (Wet-sieving, Potassium dichromate volumetry and Core-cutting sampling).

为了寻求能够提高土壤结构稳定性的耕作模式，在陇中黄土高原半干旱区连续7年的定位试验研究基础上，采用常规分析方法(湿筛法、重铬酸钾容量法、环刀法)，研究了不同耕作方式对耕层土壤结构性能及有机碳含量的影响。

The mass fraction of Fe2O3 in the mixture was calculated and used as a representation of mixedness degree. The results of the study show that the new method provides similar precision and accuracy for...

结果表明，该法与重铬酸钾法比较，精密度和准确度均无显著性差异，测定混匀度的相对误差在±2%，且方法简便、快速、准确、对环境友好，可用于生产实时监控。

The positive rate was 62.5%. The allergens with higher positive rate were nickel sulfate, 4 Phenylenediamine base, fragrance mix, potassium dichromate and formaldehyde. The positive results were found in patients with face dermatitis, eczema, contact dermatitis, urticaria and pruritus.

阳性率较高的过敏原依次为：硫酸镍、对苯二胺、芳香混合物、重铬酸钾、甲醛，斑贴阳性的病种有面部皮炎、湿疹、接触性皮炎、荨麻疹、瘙痒症。

The accurate analysis of the uranium content in the reference materials is based on the potentiometric titration method.

采用以基准物质重铬酸钾为滴定剂的自动电位滴定法对基准物质中的铀含量进行准确定值。

The high sulfur coal from Jiexiu in Shanxi is used in this experiment and the influence of removing pyritic sulfur by adding different pyrites depressors on the process of agglomeration was explored in this study,The experiment result shows that adding pyrites depressors on the process of oil agglomeration can improve the sulfur-removing rate.

油团聚是以脱除煤中灰分为主的团聚技术，脱硫的效率很低，采用山西介休的高硫煤，探索在油团聚过程中加入不同的黄铁矿抑制剂(巯基乙酸、重铬酸钾、高锰酸钾)对脱除煤中黄铁矿硫的影响。结果表明加入黄铁矿抑制剂对脱硫效率有一定程度的影响

Soil organic matter, total nitrogen, available nitrogen and pH are measured with high temperature potassium dichromate oxidation-capacity, semiminim karl method, alkaline hydrolysis pervasion method, and the potentionmeter method respectively.

用五点混合取样法采集广西桂林毛村岩溶区和非岩溶区典型林地、灌草丛地和耕地的0~20cm，20~40cm土壤样品，以高温外热重铬酸钾氧化－容量法测定有机质含量，半微量凯氏法测定全氮含量，碱解扩散法测定有效氮含量，电位法测定pH值。

Nickel sulfate was the most frequent sensitizer, followed by Thimerosal, Potassium dichromate, Fragrance mix and Formaldehyde. Frequencies of contact allergy to Thiuram mix, Mercapto mix, Imidazolidinyl urea, and bronopol were relatively low.

结果： 1 129 例受试者中，阳性反应747例，阳性反应率较高的变应原依次是：硫酸镍、硫柳汞、重铬酸钾、芳香混合物、甲醛，阳性反应率较低的变应原有：秋兰姆混合物、硫氢基混合物、咪唑烷基尿素、溴硝丙二醇。

Since there are real demands to the fine powder of expansible graphite in the market, it was studied that glacial acetic acid were inserted into 2μm5μm micro-graphite using potassium dichromate, potassium permanganate, or ammonium persulphate as oxidant and acid as medium to get FPEG low expansible volume successfully.

针对目前对低膨胀容积的可膨胀微粉石墨的实际需求，本论文研究了在酸性条件下，以重铬酸钾、高锰酸钾或过硫酸铵为氧化剂，成功地将冰醋酸插入2μm5μm石墨层间，制得低膨胀容积的可膨胀微粉石墨。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。