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Post on chemical analysis technology exchange ---- Standard 1: Is it necessary to have a gas cylinder cabinet in a newly established standard laboratory? 2. Some **standards** for chemical analysis are sought; a reward will be given. Thank you to all experts for their support. 3. Who has the course standards for oil product analysis? 4. How to prepare and calibrate a 40.1 mol/l sodium thiosulfate standard solution? 5. Questions regarding Standard YB/T 505.7-2007 on the preparation of sodium hydroxide standard solutions. 7. Enterprise standards for guaiacol. 8. My views on the new version of the standard for p-aminophenol. 9. How to prepare standard potassium permanganate solutions. 10. Are there any specifications or standards for dissolved oxygen in water? 11. **Standards for glass instruments in laboratories? 12 How to prevent the sodium thiosulfate standard solution from becoming turbid 13 Explanation for the formulation of the industry standard \"Chemical Analysis Methods for High-titanium Slag and Rutile\" 14 Seeking the analysis standard for ammonium phosphate in GB10205-2001 15 Preparing standard gases 16 How should the sampling pipelines for analysis be set up, and what standards should be referred to? 17. Looking for analysis standards for ethylbenzene and styrene. 18. Does anyone have the ASTM 3710 standard? I hope it can be shared. 19. Who can provide various testing standards for the vacuum potassium carbonate desulfurization process? 20. Standards for hiring analysts. 21. Seeking product standards for propane, propylbenzene, and MTBE. 22. Does anyone know any download addresses or databases for XRD standard patterns? 23. Are stock solutions the same as standard solutions? 24 Analysis standards for the utilization of biomass energy 25 Standards for the analysis of industrial butadiene 26 Standards related to electronic-grade products 27 Does any member have the GB/T219-1996 standard for testing the fusibility of coal ash? Please help! 28 Standard solutions and calibration solutions for ICP instruments 29 Methods for preparing and calibrating 290.05 M EDTA standard solution 30 Standard for sodium persulfate 31 How to obtain standards for calcium carbide abroad 32 How to use reference materials correctly 33 Does anyone have information on the product standards for industrial methyl acetate? 34 Are quality standards necessary for fine chemical products? 35 Acceptance criteria and specifications for laboratory instruments 36 Calibration of standard curves 37 Issues related to the calibration of standard substance contents 38 What are the mistakes made when creating standard curves? 39 YB4031-91: Industry standard of the People’s Republic of China – Titanium concentrate (rocks and minerals) 40 Please provide information on well-known domestic and international companies that produce chemical standard substances. Thank you. 41 Comparison of the coverage power of white pigments; Standard number: GB/T 5211.17-1988 42 **Standard for titanium dioxide pigments and methods for testing their properties** 43 How to formulate enterprise standards for products? 44 Regarding the expiration date of reference materials (standard solutions) 45 Question: What are the criteria for evaluating the competence of analysts? 46 Question: The 2008 edition of standard GB/T6904, 6909, 6913, and 6682 without anti-counterfeiting watermarks 47 Request a list of reference standards used in chlor-alkali chemical analysis 48 How to remove the anti-counterfeiting marks from standards? 49. Looking for product standards for propane, MTBE, cumene, propylene, mixed heavy aromatics, etc. 50. Standards related to particle size analysis of coke (with a nominal maximum particle size of more than 20 mm) using screening methods – urgently needed. 51. Seeking Sinopec industry standards 103, 114, 111, 125, 126, 124. 52. Standards for chromatography of various substances. 53. I have some other standard requirements that need assistance with. 54. What are the standards for preparing mixtures used in LCP production? 55. Websites for searching for standards. 56. Quality standards for magnesium hydroxide. 57. What are the standards related to color intensity? 58. Why does a solution turn noticeably yellow when preparing a standard sodium hydroxide solution? 59. Drawing of standard curves for liquid chromatography. 60. Standard titration solution of sodium thiosulfate. 61. Does the linear relationship of the standard curve determine the reliability of your analysis method? The most common misconception among analysts! ! 62 Acceptance criteria and specifications for laboratory instruments 63 Standards for soda ash used in analytical purity 64 Issues related to calcium ion titration in the standards 65 How to prepare methyl acetal standard solutions 66 Method for preparing standard hard water (repost)