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1500 m级国产水下卧式采油树样机码头浅水试验

2021年第50卷第3期第36页2021,50(3) ：36-44石油矿场机械OIL FIELD EQUIPMENT文章编号：1001-3482(2021)03-0036-091 500 m 级国产水下卧式采油树样机码头浅水试验孙传轩12,刘文霄12，李磊12,雷广进12,刘启蒙12,刘兴铎12(1.宝鸡石油机械有限责任公司，陕西宝鸡721002；2.中油国家油气钻井装备工程技术研究中心有限公司，陕西宝鸡721002S摘要：宝鸡石油机械有限责任公司研制的1 500 m 级水下卧式采油树样机在完成厂内试验的基础上，在烟台近海码头水深约18 m 处开展了浅水试验。

介绍了该采油树样机概况、浅水试验场地及配套设备、浅水试验内容及工艺流程。

重点介绍了该采油树在码头陆地的测试情况，以及浅水试验情况。

浅水试验结果表明：该采油树的安装回收功能、遥控潜水器(ROV)操作性能和远程控制功能均满足设计要求。

为水下采油树未来的工程海试提供了重要的实践指导，进一步推动了深水采油树的国产化研制进程。

关键词：水下；采油树；试验中图分类号:TE952文献标识码:Adoi ：10. 3969/j. issn. 1001-3482. 2021. 03. 007Shallow Water Test of 1 500 m Domestic Subsea Horizontal Tree Prototype at WharfSUN Chuanxuan 1，,LIU Wenxiao 1，丄I Lei 1'2 ,LEI Guangin 1，,LIU Qimen g 1，,LIU Xingduo 1'2(1. Baoji Oilfield Machinery Co. , Ltd. ,Baoji 721002 ? China ；2. CNPC National Engineering Reserrch Centrr frr Oil & Gas Drilling Equipment Co. , Ltd. ,Baoji 721002 ?China )Abstract : On the basis of FAT , the shallow water test for 1 500 m class subsea horizontal treeprototype has been carried out at about 18 m water depth at Yantai offshore wharf . The summaryof subsea tree prototype, shallow water test site and supporting equipment, shallow water test content and technology process were introduced. The test on the wharf land and the shadow wa ter test of the subsea tree were described in details. The shallow water test results show that the installation and recovery function , ROV operation performance and remote control function of thetree meet the d esign requirements. It provides important practical guidance for the future engi neering sea tests of the underwater tree , and further promotes the domestic development of deep water subsea tree.Keywords ： underwater ； christmas tree ； testing目前，我国已成为世界最大原油和天然气进口 9. 5%，对外依存度72. 5%，天然气进口量1 373亿国。

Low-Peak

Description:Ultimate protection Class J dual element,current-limiting, time-delay fuses available with optional open fuse indication. Time-delay – 10 seconds (minimum) at 500%of rated current.Catalog Symbols:LPJ-(amp)SP (non-indicating)LPJ-(amp)SPI (indicating)Ratings:Volts — 600Vac, 300Vdc Amps — 70-600AIR — 300kA Vac RMS Sym.— 100kA VdcAgency Information:CE, UL Listed, Guide JDDZ, File E4273CSA Certified, Class 1422-02, File 53787, Class J per CSA C22.2 No. 248.8,Catalog Numbers (amps) — Non-indicating Fuses*LPJ-70SP LPJ-125SP LPJ-250SP LPJ-500SP LPJ-80SP LPJ-150SP LPJ-300SP LPJ-600SPLPJ-90SP LPJ-175SP LPJ-350SP LPJ-100SP LPJ-200SP LPJ-400SP LPJ-110SPLPJ-225SPLPJ-450SP*Open fuse indication available on all part numbers by inserting the suffix “I,”e.g., LPJ-90SPI. Requires 75Vac minimum voltage.Carton Quantity:Amp Rating Carton Qty.70–2005225–6001Dimensions - in•Industry's only UL Listed and CSA Certified fuse with a 300kA interrupting rating that allows for simple, worry-freeinstallation in virtually any application.•Fast short-circuit protection and dual-element, time-delay performance provide ultimate protection.•Reduces existing fuse inventory by up to 33% when upgrading to Low-Peak fuses.•Consistent 2:1 ampacity ratios for all Low-Peak fuses make selective coordination easy.•Long time-delay minimizes needless fuse openings due to temporary overloads and transient surges.•Current-limitation protects downstream components against damaging thermal and magnetic effects of short-circuit currents.•Dual-element fuses have lower resistance than ordinary fuses so they run cooler.•Can often be sized for back-up protection against motor burnout from overload or single-phasing if other overload protective devices fail.•Proper sizing can provide "no damage" Type 2 coordinated protection for NEMA and IEC motor controllers.•Space-saving package for equipment downsizing.Recommended Fuse BlocksFuse Amps 1-Pole 2-Pole 3-Pole 70-100JM60100-1CR JM60100-2CR JM60100-3CR 110-200JM60200-1CR JM60200-2CR JM60200-3CR 225-400JM60400-1CR JM60400-2CR JM60400-3CR 450-600JM60600-1CRJM60600-2CRJM60100-3CRFor additional information on the JM Series of fuse blocks, see product brochure # 3192.Fuse Reducers For Class R FusesEquipment Desired Fuse Catalog NumbersFuse Clips (Case) Size(Pairs)60A 30A J-63100A 30A J-1360A J-16200A60AJ-26††Not for bolt-in applications.Available with easyID™open fuse indicationf C M A /F l o d y n e /H y d r a d y n e ▪ M o t i o n C o n t r o l ▪ H y d r a u l i c ▪ P n e u m a t i c ▪ E l e c t r i c a l ▪ M e c h a n i c a l ▪ (800) 426-5480 ▪ w wTime-Current Curves - Average Meltf C M A /F l o d y n e /H y d r a d y n e ▪ M o t i o n C o n t r o l ▪ H y d r a u l i c ▪ P n e u m a t i c ▪ E l e c t r i c a l ▪ M e c h a n i c a l ▪ (800) 426-5480 ▪ w wThe only controlled copy of this Data Sheet is the electronic read-only version located on the Bussmann Network Drive. All other copies of this document are by definition uncontrolled. This bulletin is intended Current-Limitation CurvesCurrent-Limiting EffectsProsp.Let-Through Current S.C.C.(Apparent RMS Symmetrical Vs. Fuse Rating)—100A 200A 400A 600A 10001000100010001000300020002000300030005000200030005000500010,000200040006000800015,000300040007000900020,00030004000700010,00025,00030005000800010,00030,00030005000800011,00035,00040005000900012,00040,00040006000900012,00050,0004000600010,00013,00060,0004000600011,00014,00080,0005000700012,00015,000100,0005000800012,00017,000150,0006000900014,00019,000200,0006000900016,00021,000250,000700010,00017,00023,000300,000700011,00018,00024,000f C M A /F l o d y n e /H y d r a d y n e ▪ M o t i o n C o n t r o l ▪ H y d r a u l i c ▪ P n e u m a t i c ▪ E l e c t r i c a l ▪ M e c h a n i c a l ▪ (800) 426-5480 ▪ w w。

RSR AQP4 Ab Version2 Aquaporin4 (AQP4) Autoantibod

ElisaRSR TM AQP4 Ab Version 2 Aquaporin-4 (AQP4) AutoantibodyELISA Version 2 Kit –Instructions for useRSR LimitedParc Ty Glas, Llanishen, CardiffCF14 5DU United KingdomTel.: +44 29 2068 9299 Fax: +44 29 2075 7770 Email: Website: EC REP Advena Ltd. Tower Business Centre, 2nd Flr., Tower Street, Swatar, BKR 4013 Malta.INTENDED USEThe RSR AQP4 Autoantibody ELISA Version 2 kit is intended for use by professional persons only, for the quantitative determination of AQP4 autoantibodies (AQP4 Ab) in human serum. Neuromyelitis optica (NMO), also known as Devic’s syndrome, is an immune-mediated neurologic disease that involves the spinal cord and optic nerves. It can be considered to be a disorder distinct from multiple sclerosis (MS). A serum immunoglobulin G autoantibody (NMO-IgG) has been shown to be a specific marker for NMO and the water channel aquaporin 4 (AQP4) has been identified as the antigen for NMO IgG. Measurement of AQP4 Ab can be of considerable value in distinguishing NMO from MS when full clinical features may not be apparent and early intervention may prevent or delay disability. REFERENCESV. A. Lennon et al.A serum autoantibody marker of neuromyelitis optica: distinction from multiple sclerosis.Lancet 2004 364(9451): 2106 - 2112V. A. Lennon et al.IgG marker of optic-spinal multiple sclerosis bindsto the aquaporin-4 water channel.The Journal of Experimental Medicine 2005 202: 473 - 477B. G. Weinshenker et al.Neuromyelitis optica IgG predicts relapse after longitudinally extensive transverse myelitis.Annals of Neurology 2006 59: 566 - 569N. Isobe et al.Quantitative assays for anti-aquaporin-4 antibody with subclass analysis in neuromyelitis optica. Multiple Sclerosis Journal 2012 18: 1541 – 155S. Jarius et al.Testing for antibodies to human aquaporin-4 by ELISA: Sensitivity, specificity and direct comparison with immunohistochemistry.Journal of the Neurological Sciences 2012 320:32 - 37PATENTSThe following patents apply:European patent EP 1 700 120 B1, US patents US 7,101,679 B2, US 7,947,254 B2 and US 8,889,102 B2, Chinese patent ZL200480040851.3 and Japanese patent 4538464. ASSAY PRINCIPLEIn RSR’s AQP4 Ab ELISA Version 2 kit, AQP4 Ab in patient s’ sera, calibrators and controls are allowed to interact with AQP4 coated onto ELISA plate wells and liquid phase biotinylated AQP4 (AQP4-Biotin). After incubation at room temperature for 2 hours with shaking, the well contents are discarded. AQP4 Ab bound to the AQP4 coated on the well will also interact with AQP4-Biotin through the ability of AQP4 Ab in the samples to act divalently leaving AQP4-Biotin bound to the well via an AQP4 Ab bridge. The amount of AQP4-Biotin bound is then determined in a second incubation step involving addition of streptavidin peroxidase (SA-POD), which binds specifically to biotin. Excess, unbound streptavidin peroxidase is then washed away and addition of the peroxidase substrate, 3,3’,5,5’-tetramethlybenzidine (TMB), results in formation of a blue colour. This reaction is stopped by the addition of a stop solution, causing the well contents to turn yellow. The absorbance of the yellow reaction mixture at 450nm and 405nm is then read using an ELISA plate reader. A higher absorbance indicates the presence of AQP4 autoantibody in the test sample. Reading at 405nm allows quantitation of high absorbances. It is recommended that values below 10 u/mL should be measured at 450nm. If it is possible to read at only one wavelength 405nm may be used. The measuring interval is 3.0 –80 u/mL (arbitrary RSR units).STORAGE AND PREPARATION OF SERUM SAMPLESSera to be analysed should be assayed soon after separation or stored, preferably in aliquots, at or below –20o C. 100 μL is sufficient for one assay (duplicate 50 μL determinations). Repeated freeze thawing or increases in storage temperature should be avoided. Do not use lipaemic or haemolysed samples. Studies in which EDTA, citrate and heparin plasma samples were spiked with AQP4 Ab positive sera showed minor changes in signal compared with spiked serum from the same donor. In particular OD450values with spiked EDTA, citrate and heparin plasmas were 79% - 128% of spiked serum (15 samples with serum concentrations ranging from 2.6 u/mL – 30 u/mL) or 87% - 130% in terms of u/mL. When required, thaw test sera at room temperature and mix gently to ensure homogeneity. Centrifuge serum prior to assay (preferably for 5 min at 10-15,000 rpm in a microfuge) to remove particulate matter. Please do not omit this centrifugation step if sera are cloudy or contain particulates.SYMBOLSSymbol MeaningEC Declaration of Conformity IVD In Vitro Diagnostic DeviceREF Catalogue NumberLOT Lot NumberConsult InstructionsManufactured bySufficient forExpiry DateStoreNegative ControlPositive ControlMATERIALS REQUIRED AND NOT SUPPLIED Pipettes capable of dispensing 25 μL, 50 μL and 100 μL.Means of measuring various volumes to reconstitute or dilute reagents supplied.Pure water.ELISA Plate reader suitable for 96 well formats and capable of measuring at 450nm and 405nm.ELISA Plate shaker, capable of 500 shakes/min (not an orbital shaker).ELISA Plate cover.PREPARATION OF REAGENTS SUPPLIEDStore unopened kit and all kit components at 2-8o C.A AQP4 Coated Wells12 breakapart strips of 8 wells (96 in total) in a frame and sealed in foil bag. Allow foil bag to stand at room temperature (20-25o C) for 30 minutes before opening.Ensure wells are firmly fitted in the frame provided. After opening return any unused wells to the original foil bag and seal with adhesive tape. Then place foil bag in the self-seal plastic bag with desiccant provided and store at 2-8o C for up to4 months.B1-5 Calibrators1.5, 5, 20, 40, 80 u/mL (arbitrary RSR units)5 x 0.7 mLReady for useC1-2 Positive Controls I & II(see label for concentration range) 2 x 0.7 mLReady for useD Negative Control0.7 mLReady for useEAQP4–Biotin3 vialsLyophilisedImmediately before use, reconstitute withreconstitution buffer for AQP4-Biotin (F),1.5 mL per vial. When more than one vialis to be used, pool the contents of thevials and mix gently.FReconstitution Buffer for AQP4-Biotin10 mLReady for useGStreptavidin Peroxidase (SA-POD)0.8 mLConcentratedDilute 1 in 20 with diluent for diluting SA-POD (H). For example, 0.5 mL (G) + 9.5mL (H). Store for up to 16 weeks at 2-8o Cafter dilution.HDiluent for SA-POD15 mLReady for useIPeroxidase Substrate (TMB)15 mLReady for useJConcentrated Wash Solution120 mLConcentratedDilute 1 in 10 with pure water before use.Store at 2-8o C up to kit expiry date.KStop Solution14 mLReady for useASSAY PROCEDUREAllow all reagents to stand at room temperature (20-25o C) for at least 30 minutes prior to use. Do notreconstitute AQP4-Biotin until step 2 below. AnEppendorf type repeating pipette is recommended forsteps 2, 5, 8, and 9.1. Pipette 50 μL(in duplicate) of patientsera, calibrators (B1-5) and controls (C1-2 and D) into respective wells. Leave onewell empty for blank.2. Reconstitute AQP4-Biotin and pipette25μL into each well (except blank).3. Cover the frame and shake the wells for2 hours at room temperature on an ELISAplate shaker (500 shakes per min).4. Use an ELISA plate washer to aspirateand wash the wells three times withdiluted wash solution (J). If a platewasher is not available, discard the wellcontents by briskly inverting the frame ofwells over a suitable receptacle, washthree times manually and tap the invertedwells gently on a clean dry absorbentsurface to remove excess wash.RESULT ANALYSISA calibration curve can be established by plotting calibrator concentration on the x-axis (log scale) against the absorbance of the calibrators on the y-axis (linear scale). The AQP4 Ab concentrations in patient sera can then be read off the calibration curve [plotted at RSR as a spline log/lin curve (smoothing factor = 0)]. Other data reduction systems can be used. The negative control can be assigned a value of 0.15 u/mL to assist in computer processing of assay results. Samples with AQP4 Ab concentrations above 80 u/mL can be diluted (e.g.10 x and/or 100 x) in AQP4 Ab negative serum. Some sera will not dilute in a linear way. TYPICAL RESULTS (Example only; not forAbsorbance readings at 405nm can be converted to 450nm absorbances by multiplying by the appropriate factor (3.4 in the case of equipment used at RSR).This cut off has been validated at RSR. However each laboratory should establish its own normal and pathological reference ranges for AQP4 Ab levels. Also it is recommended that each laboratory include its own panel of control samples in the assay. CLINICAL EVALUATION(The information below is derived from 450nm data) Clinical SpecificitySera from 358 individual healthy blood donors were tested in the AQP4 Ab ELISA Version 2 kit. 356 (99%) sera were identified as being negative for AQP4 Ab.Clinical SensitivityOf 62 sera from patients with NMO or NMO spectrum disorder (NMOSD) 48 (77%) were positive for AQP4 Ab.Lower Detection LimitThe negative control was assayed 20 times and the mean and standard deviation calculated. The lower detection limit at 2 standard deviations was0.17 u/mL.Clinical AccuracyAnalysis of 205 sera from patients with autoimmune diseases other than neuromyelitis optica spectrum disorders (NMOSD) indicated no interference from autoantibodies to the TSH receptor (n=110), glutamic acid decarboxylase (n=26), 21-hydroxylase (n=12), the acetylcholine receptor (n=10), thyroid peroxidase (n=15), thyroglobulin (n=10), IA-2 (n=7) or from rheumatoid factor (n=15) in the RSR AQP4 Ab ELISA Version 2. InterferenceNo interference was observed when samples were spiked with the following materials; bilirubin at 20 mg/dL or intralipid up to 3000 mg/dL. Interference was seen from haemoglobin at 500 mg/dL. SAFETY CONSIDERATIONSStreptavidin Peroxidase (SA-POD)Signal word: WarningHazard statement(s)H317: May cause an allergic skin reaction Precautionary statement(s)P280: Wear protective gloves/protective clothing/ eye protection/face protectionP302 + P352: IF ON SKIN: Wash with plenty of soap and waterP333 + P313: If skin irritation or rash occurs: Get medical advice/attentionP362 + P364: Take off contaminated clothing and wash it before reusePeroxidase Substrate (TMB)Signal word: DangerHazard statement(s)H360: May damage fertility or the unborn child Precautionary statement(s)P280: Wear protective gloves/protective clothing/eye protection/face protectionP308 + P313: IF exposed or concerned: Get medical advice/attentionThis kit is intended for use by professional persons only. Follow the instructions carefully. Observe expiry dates stated on the labels and the specified stability for reconstituted reagents. Refer to Safety Data Sheet for more detailed safety information. Avoid all actions likely to lead to ingestion. Avoid contact with skin and clothing. Wear protective clothing. Material of human origin used in the preparation of the kit has been tested and found non-reactive for HIV1 and 2 and HCV antibodies and HBsAg but should, none-the-less, be handled as potentially infectious. Wash hands thoroughly if contamination has occurred and before leaving the laboratory. Sterilise all potentially contaminated waste, including test specimens before disposal. Material of animal origin used in the preparation of the kit has been obtained from animals certified as healthy but these materials should be handled as potentially infectious. Some components contain small quantities of sodium azide as preservative. With all kit components, avoid ingestion, inhalation, injection or contact with skin, eyes or clothing. Avoid formation of heavy metal azides in the drainage system by flushing any kit component away with copious amounts of water.ASSAY PLANAllow all reagents and samples to reach room temperature (20-25 o C) before usePipette: 50 μL Calibrators, controls and patient seraPipette: 25 μL AQP4-Biotin (reconstituted) into each well (except blank)Incubate: 2 Hours at room temperature on an ELISA plate shaker at 500 shakes/min Aspirate/Decant: PlateWash: Plate three times and tap dry on absorbent material1Pipette: 100 μL SA-POD (diluted 1:20) into each well (except blank)Incubate: 20 Minutes at room temperature on a ELISA plate shaker at 500 shakes/min Aspirate/Decant: PlateWash: Plate three times and tap dry on absorbent material1, 2Pipette: 100 μL TMB into each well (including blank)Incubate: 20 Minutes at room temperature in the dark without shakingPipette: 100 μL Stop solution into each well (including blank) and shake for 5 seconds Read absorbance at 450nm and 405nm within 10 minutes of adding stop solution31It is not necessary to tap the plates dry after washing when an automatic plate washer is used2Use pure water for the final wash when washing manually3If it is possible to read at only one wavelength, 405nm may be used。

软水硬度指示剂税收分类编码

软水硬度指示剂税收分类编码
软水硬度指示剂通常被归类为化学制剂。

根据国际贸易惯例，
软水硬度指示剂通常被归类在税则编码的章节28或者38中。

具体
的税收分类编码会根据不同国家的关税法规而有所不同。

在美国，
软水硬度指示剂可能被归类在税则编码2842.00.2000（其他离子试剂）或者3822.00.5090（其他混合药品或制剂）等相关类别中。

在
欧盟，软水硬度指示剂可能被归类在税则编码2827.10（氢氧化铵
等的碱性氧化物）或者3822.00（实验室试剂）等类别中。

在其他
国家，具体的分类编码也会有所不同，需要根据当地的海关规定进
行查询确认。

总之，软水硬度指示剂的税收分类编码是根据其成分、用途和形式等因素来确定的，需要在具体的海关税则中进行查询确认。

一种新的多肽——人spaseI酶11和编码这种多肽的多核苷酸[发明专利]

专利名称：一种新的多肽——人spaseI酶11和编码这种多肽的多核苷酸
专利类型：发明专利
发明人：毛裕民,谢毅
申请号：CN00114917.2
申请日：20000315
公开号：CN1313401A
公开日：
20010919
专利内容由知识产权出版社提供
摘要：本发明公开了一种新的多肽——人spaseⅠ酶11,编码此多肽的多核苷酸和经DNA重组技术产生这种多肽的方法。

本发明还公开了此多肽用于治疗多种疾病的方法,如恶性肿瘤,血液病,HIV感染和免疫性疾病和各类炎症等。

本发明还公开了抗此多肽的拮抗剂及其治疗作用。

本发明还公开了编码这种新的人spaseⅠ酶11的多核苷酸的用途。

申请人：上海博德基因开发有限公司
地址：200092 上海市中山北二路1111号3号楼12层
国籍：CN
更多信息请下载全文后查看。

小鼠pasi评分标准 -回复

小鼠pasi评分标准-回复小鼠PASI评分标准，以中括号内的内容为主题，写一篇1500-2000字文章，一步一步回答。

[PASI评分标准]是衡量银屑病临床病程和评估病情严重程度的常用方法。

PASI全称为Psoriasis Area and Severity Index（银屑病面积及严重指数），它通过对病人体表皮损伤区域的评估，以及病灶红度、厚度和糜烂程度的评估，来综合反映银屑病的病情严重程度。

在临床研究和医疗实践中，PASI 评分标准被广泛使用，帮助医生了解病情，判断疾病的进展和治疗效果。

一、了解PASI评分标准的发展历程1.首次发布于1978年2.最初版本只包括病灶表面积评估3.后续版本逐步添加了病灶严重程度等其他指标4.经过多次修订，目前已经成为银屑病评估的国际标准二、PASI评分标准的测量步骤和指标解释1.确定患者体表受损区域的范围- 头部、躯干、上、下肢分别划分为四个区域- 针对每个区域，用患者手掌面积的称量来确定受损区域的百分比2.评估病灶红度、厚度和糜烂程度- 红度：评估受损区域的红色程度，使用五级评分，从0（无）到4（严重）- 厚度：评估受损区域的鳞屑厚度，使用五级评分，从0（无）到4（严重）- 糜烂：评估受损区域的糜烂程度，使用五级评分，从0（无）到4（严重）3.根据评分标准计算PASI总分- 分别计算每个区域的面积得分、红度得分、厚度得分和糜烂得分- 将各项得分加总得到PASI总分- PASI总分越高，代表病情越严重4.判断疾病的分类和严重程度- PASI总分<10：轻度银屑病- PASI总分10-20：中度银屑病- PASI总分>20：重度银屑病三、PASI评分标准的优缺点1.优点- 客观、可重复性强，结果可比较性高- 全面反映了银屑病的病程和病情严重程度- 评估指标明确，测量方法简单易行2.缺点- 对医生的经验和判断有一定依赖性- 部分指标评估存在主观性，结果可能会有一定的误差- 不适用于某些特定病情的评估，如关节型银屑病四、PASI评分标准在临床应用中的意义1.临床研究中的应用- 用于评估治疗效果、疗效比较和药物安全性的评估- 可以帮助确定研究的入选标准和终点指标2.医疗实践中的应用- 评估患者的病情严重程度和疾病进展情况- 此评分标准有助于医生制定个体化治疗方案，监测疗效和调整治疗计划- 提供了临床疗效评估的客观、可比性指标五、PASI评分标准的展望1.与其他评估工具的结合- 考虑与ITPA（银屑病全身评估指标）等其他评估工具相结合，综合评估疾病状态2.细化评估指标- 在红度、厚度和糜烂等指标的基础上，进一步拆解细化评估病情- 引入新的形态学评估项目，准确描述疾病特点和变化趋势通过了解PASI评分标准的发展历程、测量步骤和指标解释，我们可以更好地理解其在银屑病评估中的应用意义。

碱熔-蒸馏-滴定法测定萤石中的氟化钙含量

Vol. 11, No. 144〜48第11卷第1期2021年2月中国无机分析化学ChineseJournalofInorganicAnalyticalChemistrydoi ：10. 3969". issn. 2095-1035. 2021. 01. 009碱熔-蒸@-滴定法测定萤石中的氟化钙含量刘金优杨琛杨宇红程堆强(通标标准技术服务有限公司，天津300457)摘要采用碱熔-蒸—-滴定法测萤石中氟含量，计算得到氟化钙含量。

萤石试样首先用碳酸钠碱熔消解，然后经硫酸-水蒸气蒸—分离氟，以茜素磺酸钠作指示剂，用硝酸‘溶液滴定测出其中氟含量，并计算得到氟化钙含量。

利用X 射线衍射光谱(XRD)法验证了萤石中氟的存在形式，并通过实验确定了碳酸钠使用量、硫酸溶液加入量、蒸—温度和蒸—时间等的最佳实验条件。

采用国家标准样品对方法进行了准确度和精密度验证，几个标准样品的碱熔-蒸—-滴定法结果均在标准值允许误差范围内，相对标准偏差(RSD)均小于0. 5%，方法准确可靠，值得推广。

关键词萤石；氟化钙含量；碱熔;蒸—中图分类号：O655. 2文献标志码：A 文章编号：2095-1035(2021)01-0044-05DeterminationofCaF 2 ContentinFluorsparbyTitrationMethodwithAlkalineFusion-DistilationLIU Jinyou,YANG Chen, YANG Yuhong,CHENG Duiqiang(,SGS~CSTC Standards Technical Services Co. «Ltd. , Tianjin 300457 China )Abstract Inthispaperthecontentoffluorineinfluorsparwasdeterminedbyalkalinefusion-disti l ation-titration method , and the content of CaF 2 was calculated. The fluorspar sample was first dissolved bysoCiumcarbonatethenseparateCbysulfuricaciCsteamCisti l ation.ThefluoriCecontentwasCetermineCby titration of thorium nitrate solution with sodium alizarin sulfonate as indicator, then CaF 2 calculated. The fluorine form in fluorspar was determined by XRD !andthroughthetestoftheusingamountofsodiumcarbonate and sulfuric acid solution !the disti l ation temperature and time di f erences !the suitableexperimental conditions were determined. The accuracy and precision of this method were also verified byusing national standard samples. The RSD of alkaline fusion-distillation-titration method of all samples are less than 0. 5% indicating the method is accurate and reliable !which is worth promoting.Keywords fluorspar ；CaF 2 content ；alkaline fusion ；distillation.> i —1—刖Y要的非金属矿产资源，欧美等许多发达国家将其作为一种重要战略物资进行储备工。

牙膏中甘油磷酸根免试剂离子色谱测定

牙膏中甘油磷酸根免试剂离子色谱测定
董晓莉;叶明立;陈永欣;曾雪灵
【期刊名称】《理化检验-化学分册》
【年(卷),期】2006(042)012
【摘要】钙是非常重要的营养元素，人们对如何补钙都十分感兴趣，但一般的钙盐都会有涩的味道，不适合用于口服或口腔护理用品。

甘油磷酸钙和葡萄糖酸钙的口感都比较好，除此之外，甘油磷酸钙在防龋方面也有很好的效果，近年来，甘油磷酸钙越来越受到青睐，成为常用的防龋添加剂。

【总页数】2页(P1047-1048)
【作者】董晓莉;叶明立;陈永欣;曾雪灵
【作者单位】浙江大学,化学系,杭州,310028;浙江大学,化学系,杭州,310028;广西出入境检验检疫局防城港分局,防城港,538000;广州电器科学研究所,广州,510302【正文语种】中文
【中图分类】O657.31
【相关文献】
1.化学镀液中次磷酸根和亚磷酸根的离子色谱测定 [J], 吕伟;毛家骏
2.离子色谱法测定牙膏中甘油磷酸根的含量 [J], 张薇薇;丁卉;王荣;刘菊;施超欧
3.离子色谱法测定甘油磷酸制剂中的β-甘油磷酸根和L-苹果酸根 [J], 刘玉秀;喻宏伟
4.免化学试剂-离子色谱法测定小麦粉中溴酸钾的不确定度评定 [J], 李东刚;吴凡;
李春娟;胡友波
5.离子色谱法测定牙膏中的甘油磷酸根含量 [J], 施青红;陈永欣;叶明立;朱岩因版权原因，仅展示原文概要，查看原文内容请购买。

低压离子色谱法分析重水中微量氯离子

低压离子色谱法分析重水中微量氯离子
张新申;蒋小萍
【期刊名称】《分析化学》
【年(卷),期】1995(23)8
【摘要】1 引言重水产品要求氯离子含量低于 1:＜10’g/mL,高于此含量便成为不合格品．本文采用低压离子色谱法分析重水产品中痕量氯离子．
【总页数】1页(P985)
【作者】张新申;蒋小萍
【作者单位】不详;不详
【正文语种】中文
【中图分类】TQ1235.56
【相关文献】
1.低压离子色谱法分析茶水中的无机离子 [J], 张新申;廖峰;罗世元
2.离子色谱法测定双氧水中微量氯离子 [J], 陆克平;刘心烈
3.低压离子色谱法分析水溶液中微量铝 [J], 张新申;蒋小萍
4.低压离子色谱法测定三苯基膦中痕量氯离子 [J], 刘玲;周光明;张新申
5.离子色谱法测定饮用水中氯离子的不确定度分析 [J], 邓良利;谯斌宗
因版权原因，仅展示原文概要，查看原文内容请购买。