ABSTRACT
The formulation and revision of the detection methods of indoor air quality standards is an important, rigorous and delicate endeavor. This paper introduced the formulation and revision of the detection methods of the standards for indoor air quality (GB/T 18883-2022), focusing on the revision process, revision principles, main adjustments and technical points of some key indicators to facilitate users to better understand and apply the detection methods in standards for indoor air quality (GB/T 18883-2022).
Subject(s)
Humans , Air Pollution, Indoor , China , Reference Standards , Air Pollutants/analysisABSTRACT
The formulation and revision of the detection methods of indoor air quality standards is an important, rigorous and delicate endeavor. This paper introduced the formulation and revision of the detection methods of the standards for indoor air quality (GB/T 18883-2022), focusing on the revision process, revision principles, main adjustments and technical points of some key indicators to facilitate users to better understand and apply the detection methods in standards for indoor air quality (GB/T 18883-2022).
Subject(s)
Humans , Air Pollution, Indoor , China , Reference Standards , Air Pollutants/analysisABSTRACT
Objective To develop a high performance liquid chromatography (HPLC) for the determination of fourteen dyes in hair dying formulations.Methods Dyes were separated on a amide bonded C_(16) silica column (250 mm?4.6 mm,5?m),the target analytes were ion-paired prior to HPLC analysis with elution employing methanol-0.025 mol/L phosphate buffer (pH=6.0) containing 1 g/L 1-heptanesulfonic acid sodium salt as mobile phase and detection by a photodiode array detector with the detection wavelength of 230 nm and 280 nm.The flow rate was 1.0 ml/min and the column temperature was 25℃.Results The linear range were 10-500 mg/L,the detection limits were 0.3-2.0 mg/L,the coeffieients of variation were less than 10%(except 2-amino-6-chloro-4-nitrophenol at low concentration) and the recovery rates were 71.3%-118.5%.Conclusion The methods of high performance liquid chromatography introduced in this paper is simple,rapid,accurate and is applicable to the analysis of various hair dyes.
ABSTRACT
<p><b>OBJECTIVE</b>To study the therapeutic effect of Molida therapy in the out-patient department for patients with III B prostatitis.</p><p><b>METHODS</b>One hundred and thirty-six patients with II B prostatis accompanied with psychological disorder of different degrees were divided into two groups: Group A (68 cases), treated with routine drug and Molida therapy, and Group B (68 cases), treated with routine drug only. The therapeutic effects of the two groups were analyzed.</p><p><b>RESULTS</b>After an 8-week treatment, the scores of self-feeling symptoms of SCL-90, SAS and SDS in Group A were 70.5 +/- 22.3, 18.7 +/- 8.5 and 21.4 +/- 9.0, respectively, significantly lower than those in Group B (P < 0.05) and the rates of efficacy and obvious efficacy in alleviating prostatodynia in Group A were 100% and 72.1%, respectively, both higher than in Group B (P < 0.05).</p><p><b>CONCLUSION</b>Molida therapy in the out-patient department is useful in improving the psychological disorder and enhancing the therapeutic effect for patients with III B prostatitis.</p>