Zheng, Yajuan published the artcileAn improvement of the method for measurements of silicon content in water for laboratory use, Safety of 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, the publication is Guangdong Huagong (2012), 39(1), 105, 86, database is CAplus.
Platinum crucible intended for determination silicon content in water suffers from several disadvantages that it is very costly, difficult to preserve and not widely accessible. In the paper, the method adopted Teflon pot to replace Platinum crucible in the process of evaporation and condensation can satisfy the requirements of accuracy and precision, meanwhile, the approach utilization Teflon pot is cost-effective and time-saving.
Guangdong Huagong published new progress about 116-63-2. 116-63-2 belongs to naphthyridine, auxiliary class Sulfonic acid,Amine,Naphthalene,Alcohol,Organic Pigment, name is 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, and the molecular formula is C7H16ClNO2, Safety of 4-Amino-3-hydroxynaphthalene-1-sulfonic acid.
Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem